You are an assistant tasked with analyzing measurement histories to predict the patient's next laboratory or vital sign value.
<PatientData>
Demographics: {'race': 'Asian', 'gender': 'MALE', 'year of birth': 1947}
Prior Diagnosis 1: {'condition': 'Prediabetes', 'condition status': 'Not Extracted', 'start date': '1980-01-09', 'end date': None}
Prior Diagnosis 2: {'condition': 'Chronic sinusitis (disorder)', 'condition status': 'Not Extracted', 'start date': '1989-05-09', 'end date': None}
Prior Diagnosis 3: {'condition': 'Gout', 'condition status': 'Not Extracted', 'start date': '2002-03-01', 'end date': None}
Prior Diagnosis 4: {'condition': 'Localized  primary osteoarthritis of the hand', 'condition status': 'Not Extracted', 'start date': '2010-08-28', 'end date': None}
Prior Diagnosis 5: {'condition': 'Viral sinusitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2011-07-28', 'end date': '2011-08-18'}
Prior Diagnosis 6: {'condition': 'Polyp of colon', 'condition status': 'Not Extracted', 'start date': '2012-01-03', 'end date': '2013-03-11'}
Prior Diagnosis 7: {'condition': 'Acute viral pharyngitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2012-01-03', 'end date': '2012-01-15'}
Prior Diagnosis 8: {'condition': 'Viral sinusitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2012-12-18', 'end date': '2013-01-16'}
Last Potassium measurement on 2014-04-29 00:00:00: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmol/L', 'value': 3.8}
Prior measurements of the same type 1: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mmol/L', 'value': 3.95}
Prior measurements of the same type 2: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mmol/L', 'value': 4.91}
Prior measurements of the same type 3: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mmol/L', 'value': 4.86}
Prior measurements of the same type 4: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmol/L', 'value': 3.8}
Prior measurements of different types 1: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 2: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'cm', 'value': 175.68}
Prior measurements of different types 3: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'kg', 'value': 115.21}
Prior measurements of different types 4: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'kg/m2', 'value': 37.33}
Prior measurements of different types 5: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mmHg', 'value': 117.0}
Prior measurements of different types 6: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mmHg', 'value': 85.0}
Prior measurements of different types 7: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 8: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 80.0}
Prior measurements of different types 9: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 8.0}
Prior measurements of different types 10: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 11: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 9.97}
Prior measurements of different types 12: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mmol/L', 'value': 142.0}
Prior measurements of different types 13: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mmol/L', 'value': 102.0}
Prior measurements of different types 14: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mmol/L', 'value': 22.0}
Prior measurements of different types 15: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 165.0}
Prior measurements of different types 16: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 106.0}
Prior measurements of different types 17: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 69.0}
Prior measurements of different types 18: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-05-19T00:00:00', 'unit': 'mg/dL', 'value': 74.0}
Prior measurements of different types 19: {'measurement': 'Polyp size greatest dimension by CAP cancer protocols', 'measurement type': 'EHR encounter record', 'measurement date': '2012-01-03T00:00:00', 'unit': 'mm', 'value': 3.0}
Prior measurements of different types 20: {'measurement': 'Hemoglobin.gastrointestinal [Presence] in Stool by Immunologic method', 'measurement type': 'EHR encounter record', 'measurement date': '2012-01-03T00:00:00', 'unit': 'ng/mL', 'value': 14.0}
Prior measurements of different types 21: {'measurement': 'Oral temperature', 'measurement type': 'EHR encounter record', 'measurement date': '2012-01-06T00:00:00', 'unit': 'Cel', 'value': 38.0}
Prior measurements of different types 22: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 23: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'cm', 'value': 175.68}
Prior measurements of different types 24: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'kg', 'value': 114.21}
Prior measurements of different types 25: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'kg/m2', 'value': 37.0}
Prior measurements of different types 26: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mmHg', 'value': 132.0}
Prior measurements of different types 27: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mmHg', 'value': 78.0}
Prior measurements of different types 28: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 29: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mg/dL', 'value': 68.0}
Prior measurements of different types 30: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mg/dL', 'value': 15.0}
Prior measurements of different types 31: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 32: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mg/dL', 'value': 9.37}
Prior measurements of different types 33: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mmol/L', 'value': 141.0}
Prior measurements of different types 34: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mmol/L', 'value': 101.0}
Prior measurements of different types 35: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-16T00:00:00', 'unit': 'mmol/L', 'value': 23.0}
Prior measurements of different types 36: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 37: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'cm', 'value': 175.68}
Prior measurements of different types 38: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'kg', 'value': 112.98}
Prior measurements of different types 39: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'kg/m2', 'value': 36.61}
Prior measurements of different types 40: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mmHg', 'value': 130.0}
Prior measurements of different types 41: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mmHg', 'value': 82.0}
Prior measurements of different types 42: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 43: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mg/dL', 'value': 80.0}
Prior measurements of different types 44: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mg/dL', 'value': 8.0}
Prior measurements of different types 45: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 46: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mg/dL', 'value': 8.68}
Prior measurements of different types 47: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mmol/L', 'value': 137.0}
Prior measurements of different types 48: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mmol/L', 'value': 109.0}
Prior measurements of different types 49: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2013-05-14T00:00:00', 'unit': 'mmol/L', 'value': 23.0}
Prior measurements of different types 50: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 51: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'cm', 'value': 175.68}
Prior measurements of different types 52: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'kg', 'value': 111.01}
Prior measurements of different types 53: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'kg/m2', 'value': 35.97}
Prior measurements of different types 54: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmHg', 'value': 119.0}
Prior measurements of different types 55: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmHg', 'value': 80.0}
Prior measurements of different types 56: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': '%', 'value': 6.2}
Prior measurements of different types 57: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mg/dL', 'value': 74.0}
Prior measurements of different types 58: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mg/dL', 'value': 11.0}
Prior measurements of different types 59: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 60: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mg/dL', 'value': 9.36}
Prior measurements of different types 61: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmol/L', 'value': 141.0}
Prior measurements of different types 62: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmol/L', 'value': 108.0}
Prior measurements of different types 63: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-29T00:00:00', 'unit': 'mmol/L', 'value': 24.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2010-08-28', 'end datetime': '2010-08-28'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-05-19', 'end datetime': '2011-05-19'}
Visit 3: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-08-02', 'end datetime': '2011-08-02'}
Visit 4: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-01-02', 'end datetime': '2012-01-02'}
Visit 5: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-01-06', 'end datetime': '2012-01-06'}
Visit 6: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-05-16', 'end datetime': '2012-05-16'}
Visit 7: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-12-24', 'end datetime': '2012-12-24'}
Visit 8: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-03-11', 'end datetime': '2013-03-11'}
Visit 9: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-05-14', 'end datetime': '2013-05-14'}
Visit 10: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-04-29', 'end datetime': '2014-04-29'}
Medication 1: {'Drug name': 'Naproxen sodium 220 MG [Aleve]', 'Start datetime': '2010-08-28', 'End datetime': '2010-08-28', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Procedure 1: {'procedure': 'Colonoscopy', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2012-01-02', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 2: {'procedure': 'Fecal occult blood test', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2012-01-03', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 3: {'procedure': 'Rectal polypectomy', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2012-01-03', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 4: {'procedure': 'Colonoscopy', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2013-03-11', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
</PatientData>
Based on the trajectory above, what will the patient's **next** Potassium value be on 2015-04-12 00:00:00?
A. 4.9
B. 4.56
C. 4.89
D. 4.23
E. 4.22
Please share a single capital letter representing your selected answer: 
4.9 4.56 4.89 4.23 4.22