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: Medicine
Prophylaxis for migraine 
Select and explain. 
A. Sumitriptan, B. Amytriptiline, C. Nifidipine, D. Diazepam
B: Amytriptiline
Answer: B: Amytriptiline 
Explanation: K.D Tripathy essentials of medical pharmacology 7th edition . *Drugs for prophylaxis of migraine are beta blockers(propranalol ),TCA(amitriptyline ), calciumchannelblockers(flunarizine),anticonvulsants (valproate),5HT antagonist. Ref Harrison20th edition pg 2234