This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Pharmacology
[{'content': 'A lady suffering from GTCS is on phenytoin. She becomes pregnant. What advice u will give to the patient: \nSelect and explain. \nA. Stop phenytoin, start phenobarbitone, B. Stop phenytoin, start lamotrigine, C. Stop phenytoin, start magnesium infusion, D. Continue phenytoin and add folic acid in last 2 weeks of pregnancy along with vitamin k', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. Continue phenytoin and add folic acid in last 2 weeks of pregnancy along with vitamin kThough phenytoin is teratogenic drug, but if patient becomes pregnant during the course of the treatment, discontinuation of therapy can precipitate status epilepticus. So we should continue the drug along with folic acid supplementation and vitamin K in 2 and 3 trimesters.', 'role': 'assistant'}]