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
Recently approved drug for migraine prophylaxis is: 
Select and explain. 
A. Sumatriptan, B. Topiramate, C. Gabapentin, D. Propranolol
B: Topiramate
Answer: B: Topiramate 
Explanation: Topiramate has been approved for prophylaxis of migraine; may be used when blockers/other prophylactics are contraindicated or are not effective.