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: Pharmacology
Rizatriptan is a drug used for?(DNB 2012-section-1) 
Select and explain. 
A. Prophylaxis of migraine, B. Acute migraine, C. Cluster headache, D. Chronc migraine
B: Acute migraine
Answer: B: Acute migraine 
Explanation: Ans. (b) Acute migraineRefiHarrison's 18/e, ch 14