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': 'Which antiepileptic drug is least secreted in breast milk ? \nSelect and explain. \nA. Ethosuximide, B. Clonazepam, C. Gabapentin, D. Carbamazepine', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Clonazepam", 'role': 'assistant'}]