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': 'Drug of choice for acute migraine is: March 2010, March 2013 \nSelect and explain. \nA. Methysergide, B. Sumatriptan, C. Ergotamine, D. Propranolol', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B: Sumatriptan', 'role': 'assistant'}]