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
[{'content': 'A 35 - year old male develops involvements of PIP,DIP and metacarpo phalangeal joints with sparing of wrist and carpometacarpal joints. The probable diagnosis is - \nSelect and explain. \nA. Psoriatic arthopathy, B. Osteo arthritis, C. Rheumatoid arthritis, D. Pseudo gout', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]