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
Fetal hydantoin syndrome is seen if following drug is used in pregnancy? 
Select and explain. 
A. Phenytoin, B. Alcohol, C. Ethosuximide, D. Phenobarbiton
A: Phenytoin
Answer: A: Phenytoin 
Explanation: 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.