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': 'Not true about osteoarthritis \nSelect and explain. \nA. Most common joint disease, B. DIP joint is spared, C. Non-Inflammatory condition, D. Narrowing of joint space', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]