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: Gynaecology & Obstetrics
[{'content': 'Which anticonvulsant is safe during pregnancy ? \nSelect and explain. \nA. Valproic acid, B. Carbamazepine, C. Ethosuximide, D. Phenytoin', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Carbamazepine', 'role': 'assistant'}]