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
Which of the following drug is useful in prophylaxis of migraine: 
Select and explain. 
A. Propranolol, B. Sumatriptan, C. Domperidone, D. Ergotamine
A: Propranolol
Answer: A: Propranolol 
Explanation: Propranolol