This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Which vitamin deficiency is most commonly seen in a pregnant mother who is on phenytoin therapy for epilepsy: \nSelect and explain. \nA. Vitamin B6, B. Vitamin B12, C. Vitamin A, D. Folic acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Hypotension and arrythmias occur only on iv injection.\nVitamin deficiencies associated with phenytoin: — Folic acid (most common)\n\n– Vitamin D\n– Vitamin K\nThese vitamin deficiencies occur in all patients an phenytoin therapy and have nothing do with pregnancy. Hence all patients on phenytoin are advised to take folic acid supplementation.', 'role': 'assistant'}]