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
Drug used in treatment of migraine ? 
Select and explain. 
A. 5HT1 agonist, B. 5HT1 antagonist, C. Dl agonist, D. D1 antagonist
A: 5HT1 agonist
Answer: A: 5HT1 agonist 
Explanation: Ans. is 'a' i.e., 5HT1 agonist