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
[{'content': 'True about psoriatic arthritis are all expect - \nSelect and explain. \nA. HLA-Cw6 association, B. Involvement of DIP joint, C. More common in males, D. DOC is methotrexate', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Psoriatic arthritis does not have sex predilection.\nThe largest and most consistent reported relative risk has been with HLA-Cω6.\nPsoriatic arthritis involves DIP joints and the DOC for psoriatic arthritis is methotrexate.', 'role': 'assistant'}]