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: Medicine
[{'content': 'Drugs used for Prophylaxis of migraine include the following except? \nSelect and explain. \nA. Sumitriptan, B. Valproate, C. Serotonergic drugs, D. TCAs', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]