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 anti-epileptic is not contraindicated during pregnancy? \nSelect and explain. \nA. Ethosuxmide, B. Carbamazepine, C. Phenytoin, D. Valproate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Carbamazepine REF: The treatment of epilepsy Simon D. Shorvon - Page 279 "Carbamazepine is the antiepileptic of choice during pregnancy" The latest data from Jentink et al (BMJ 2010;341:c6581) are drawn from the EUROCAT Antiepileptic Study Database and show that carbamazapine was associated with a raised incidence of spina bifida but the absolute risk was small -- 2 per 1000 against a background rate at 1 per 1000.', 'role': 'assistant'}]