This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Autacoids, Subject name: Pharmacology
All of the following can be used for prophylaxis of migraine except 
Select and explain. 
A. Sumatriptan, B. Valproate, C. Propanol, D. Topiramate
A: Sumatriptan
Answer: A: Sumatriptan 
Explanation: Migraine prophylaxis include (i) Anticonvulsants (valproate and Topiramate),(ii) Antidepressants (amitriptyline and fluoxetine),(iii) Calcium channel blockers (verapamil,flunarizine)(iv) b-adrenoceptor antagonists (propranolol, timolol) Sumatriptan is used for treating acute migraine acute migraine: NSAIDS, Sumatriptan, ergotamine REF :ESSENTIALS OF MEDICAL PHARMACOLOGY:KD TRIPATHI, 8TH EDITION