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
Drug of choice in acute severe migraine is : 
Select and explain. 
A. Ergotamine, B. Sumatriptan, C. Dihydroergotamine, D. Propranolol
B: Sumatriptan
Answer: B: Sumatriptan 
Explanation: None