This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
[{'content': 'All of the following statements about treatment of migraine are true, except: \nSelect and explain. \nA. Narotriptan has slower onset and longer t1/2 than sumatriptan, B. Rizatriptan is more efficacious than sumatriptan, C. Sumatriptan is a selective 5-HT 1B/1D agonist, D. Sumatriptan is used for chronic migraine', 'role': 'user'}, {'content': "Answer: D \nExplanation: Acute management of a migraine with 5HT1agonist Rizatriptan and eletriptan are the most efficacious of the triptans currently available Triptans are selective 5-HT1B/1D receptor agonists. Sumatriptan used in acute conditions, not for chronic. Ref - Harrison's internal medicine 20e pg 3098", 'role': 'assistant'}]