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
[{'content': 'Migraine prophylaxis includes: \nSelect and explain. \nA. Verapamil, B. Valproate, C. Amitryptiline, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Trick:\xa0Very Volatile Pharma Agent For\xa0Migraine Prophylaxis\nV\xa0 →\xa0 Verapamil\nV\xa0 →\xa0 Valproate\nP\xa0 →\xa0\xa0Pizotifen\nA\xa0 →\xa0 Amitryptiline\nF\xa0 →\xa0 Flunarizine\nM\xa0 →\xa0 Methylsergide\nP\xa0 →\xa0 Propranolol', 'role': 'assistant'}]