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: Pharmacology
[{'content': 'Fetal Hydantoin Syndrome is caused by: \nSelect and explain. \nA. Phenytoin, B. Alcohol, C. Tetracycline, D. Sodium valproate', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Use of phenytoin in pregnancy can result in fetal hydantoin syndrome. It is charecterized by the presence of hypoplastic phalanges, cleft lip, cleft palate and microcephaly. Ref: Essentials of Medical Pharmacology By KD Tripathi, 5th Edition, Page 372, 374, 672; Management of Genetic Syndromes By Suzanne B. Cassidy, Judith E. Allanson.', 'role': 'assistant'}]