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
Treatment of choice in seronegative spondy- larthritis is - 
Select and explain. 
A. Phenylbutazone, B. Aspirin, C. Indomethacin, D. Corticosteroid
C: Indomethacin
Answer: C: Indomethacin 
Explanation: None