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
All of the following are true about Triptans except: 
Select and explain. 
A. They are the DOC in Acute attack of migraine, B. Frovatriptan is the longest acting triptan, C. Sumatriptan can also be given subcutaneously, D. They acting by inhibiting 5HT 1B / 1D receptors
D: They acting by inhibiting 5HT 1B / 1D receptors
Answer: D: They acting by inhibiting 5HT 1B / 1D receptors 
Explanation: Triptans are 5HT 1B / 1D agonists, not antagonists.