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: Medicine
Migraine prophylaxis includes: 
Select and explain. 
A. Verapamil, B. Valproate, C. Amitryptiline, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Trick: Very Volatile Pharma Agent For Migraine Prophylaxis
V  →  Verapamil
V  →  Valproate
P  →  Pizotifen
A  →  Amitryptiline
F  →  Flunarizine
M  →  Methylsergide
P  →  Propranolol