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: Orthopaedics
True about psoriatic arthritis are all expect - 
Select and explain. 
A. HLA-Cw6 association, B. Involvement of DIP joint, C. More common in males, D. DOC is methotrexate
C: More common in males
Answer: C: More common in males 
Explanation: Psoriatic arthritis does not have sex predilection.
The largest and most consistent reported relative risk has been with HLA-Cω6.
Psoriatic arthritis involves DIP joints and the DOC for psoriatic arthritis is methotrexate.