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': 'Hypospadias in the baby is caused by maternal use of which of the following drug ? \nSelect and explain. \nA. Diethylstilbestrol, B. Tolbutamide, C. Clomiphene, D. Clobazam', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]