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': 'Not a teratogen is: \nSelect and explain. \nA. Alcohol, B. Warfarin, C. Metocloperamide, D. Phenytoin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Metocloperamide', 'role': 'assistant'}]