This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.N.S, Subject name: Medicine
[{'content': 'Drugs used in management of migraine include the following except? \nSelect and explain. \nA. Valproate, B. Ethosuximide, C. Topiramate, D. Verapamil', 'role': 'user'}, {'content': 'Answer: B \nExplanation: *Drugs that have been approved by the FDA for prophylactic treatment of migraine are propranolol,timolol,valproate,topiramate and methysergid Ref Harrison20th edition pg 2134', 'role': 'assistant'}]