You are an assistant tasked with analyzing medical histories to determine which medication is missing from the patient’s current regimen.

<PatientData>
Demographics: {'race': 'Asian', 'gender': 'FEMALE', 'year of birth': 1977}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-12-23', 'end datetime': '2012-12-23'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-02-26', 'end datetime': '2014-02-26'}
Visit 3: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2015-02-18', 'end datetime': '2015-02-18'}
Visit 4: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2016-01-05', 'end datetime': '2016-01-05'}
Measurement 1: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'cm', 'value': 158.29}
Measurement 2: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'kg', 'value': 106.34}
Measurement 3: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'kg/m2', 'value': 42.44}
Measurement 4: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'mmHg', 'value': 103.0}
Measurement 5: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'mmHg', 'value': 87.0}
Measurement 6: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'mg/dL', 'value': 175.0}
Measurement 7: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'mg/dL', 'value': 145.0}
Measurement 8: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'mg/dL', 'value': 67.0}
Measurement 9: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2012-12-23T00:00:00', 'unit': 'mg/dL', 'value': 79.0}
Measurement 10: {'measurement': 'Oral temperature', 'measurement type': 'EHR encounter record', 'measurement date': '2015-02-18T00:00:00', 'unit': 'Cel', 'value': 38.0}
Measurement 11: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'cm', 'value': 158.29}
Measurement 12: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'kg', 'value': 112.13}
Measurement 13: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'kg/m2', 'value': 44.75}
Measurement 14: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'mmHg', 'value': 116.0}
Measurement 15: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'mmHg', 'value': 76.0}
Measurement 16: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'mg/dL', 'value': 193.0}
Measurement 17: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'mg/dL', 'value': 112.0}
Measurement 18: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'mg/dL', 'value': 105.0}
Measurement 19: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2016-01-05T00:00:00', 'unit': 'mg/dL', 'value': 65.0}
Procedure 1: {'procedure': 'Throat culture (procedure) ', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2015-02-18', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 2: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2016-01-05', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Current Medications:
Medication 1: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1981-04-07', 'End datetime': '1981-04-07', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
</PatientData>

Based on the EHR history above, which medication **should also be on the list today**?

A. 24 HR Metformin hydrochloride 500 MG Extended Release Oral Tablet
B. predniSONE 5 MG Oral Tablet
C. Memantine hydrochloride 2 MG/ML [Namenda]
D. Xulane 150/35 MCG/Day Weekly Transdermal System
E. Mestranol / Norethynodrel [Enovid]

Please share a single capital letter representing your selected answer: 
24 HR Metformin hydrochloride 500 MG Extended Release Oral Tablet predniSONE 5 MG Oral Tablet Memantine hydrochloride 2 MG/ML [Namenda] Xulane 150/35 MCG/Day Weekly Transdermal System Mestranol / Norethynodrel [Enovid]