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
Triptans used in migraine headaches are agonists at which receptor : 
Select and explain. 
A. 5HT ID/IB, B. 5HTIA, C. 5HT3, D. 5HT2A
A: 5HT ID/IB
Answer: A: 5HT ID/IB 
Explanation: None