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

<PatientData>
Demographics: {'race': 'White', 'gender': 'FEMALE', 'year of birth': 1911}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '1993-11-16', 'end datetime': '1993-11-16'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '1994-09-02', 'end datetime': '1994-09-02'}
Current Medications:
Medication 1: {'Drug name': 'Insulin Lispro 100 UNT/ML Injectable Solution [Humalog]', 'Start datetime': '1965-03-23', 'End datetime': '1965-03-23', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 2: {'Drug name': 'Acetaminophen 325 MG Oral Tablet', 'Start datetime': '1968-04-02', 'End datetime': '1968-06-07', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 3: {'Drug name': 'Acetaminophen 325 MG Oral Tablet', 'Start datetime': '1989-11-02', 'End datetime': '1989-11-16', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 4: {'Drug name': 'Acetaminophen 325 MG Oral Tablet', 'Start datetime': '1993-10-12', 'End datetime': '1993-10-12', '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. Methylphenidate Hydrochloride 20 MG [Ritalin]
B. 24 HR Metformin hydrochloride 500 MG Extended Release Oral Tablet
C. oxaliplatin 5 MG/ML [Eloxatin]
D. Naproxen sodium 220 MG [Aleve]
E. Estrostep Fe 28 Day Pack

Please share a single capital letter representing your selected answer: 
Methylphenidate Hydrochloride 20 MG [Ritalin] 24 HR Metformin hydrochloride 500 MG Extended Release Oral Tablet oxaliplatin 5 MG/ML [Eloxatin] Naproxen sodium 220 MG [Aleve] Estrostep Fe 28 Day Pack