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': 'Sumatriptan is \nSelect and explain. \nA. 5-HT 1D/1B agonists, B. 5-HT 1D/1B antagonist, C. 5-HT 1A agonist,, D. 5-HT 1A antagonist', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Sumatriptan a 5-HT 1D/1B agonist is used for acute migraine attacks. Buspirone, a 5-HT 1A agonist is an effective nonbenzodiazepine anxiolytic. ref - harrisons internal medicine 20e pg3100', 'role': 'assistant'}]