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': 'A 35-year-old male develops involvements of PIP, DIP and metacarpophalangeal joints with sparing of the wrist and carpometacarpal joints. The probable diagnosis is - \nSelect and explain. \nA. Psoriatic arthopathy, B. Osteoarthritis, C. Rheumatoid arthritis, D. Pseudo gout', 'role': 'user'}, {'content': 'Answer: A \nExplanation: First let me exclude the other options :\n\n\nMTP joint involvement is not seen in OA.\nDIP joint involvement is not seen in RA.\nIn pseudogout, large joints like knee, ankle are involved. Small joint are not involved.\n\n\nNow we are left with psoriatic arthritis. In Psoriatic arthritis any pattern of joint involvement can be seen.', 'role': 'assistant'}]