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: Surgery
[{'content': 'Joint not involved in osteoahritis ? \nSelect and explain. \nA. PIP, B. PIP, C. MCP, D. Knee', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., MCP Joint involvement in OA Common joints : Knee, Hip, Spine (cervical, lumbosacral), Hand (PIP, DIP, first carpometacarpal), first tarsometatarsal. Uncommon joint : Shoulder Spared : Wrist, elbow, ankle, metacarpophalangeal.", 'role': 'assistant'}]