This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Central Nervous system, Subject name: Pharmacology
[{'content': 'Fetal hydantoin syndrome is seen if following drug is used in pregnancy? \nSelect and explain. \nA. Phenytoin, B. Alcohol, C. Ethosuximide, D. Phenobarbiton', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Used during pregnancy---<:an produce foetal i-!ydantoin syndrome (hypoplastic phalano;es, cleft palate, hare lip, microcephaly), oshich is probably caused by its areneoxide metabolite REF KD TRIPATHI 8thh ed.', 'role': 'assistant'}]