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 used in treatment of migraine ? \nSelect and explain. \nA. 5HT1 agonist, B. 5HT1 antagonist, C. Dl agonist, D. D1 antagonist', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., 5HT1 agonist", 'role': 'assistant'}]