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: Skin
In psoritic ahropathy TOC is 
Select and explain. 
A. Mtx, B. 5FU, C. PUVA, D. Steroid
A: Mtx
Answer: A: Mtx 
Explanation: A i.e. Mtx