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': 'Heberden node denotes involvement of ? \nSelect and explain. \nA. Distal inetrphalangeal joint, B. Proximal interphalangel joint, C. Metacarpophalangeal joint, D. Metatarsophalangeal joint', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Distal inetrphalangeal joint In osteoahritis of hand : i) Distal interphalangeal joint :- Heberden's node ii) Proximal interphalangeal joint :- Bouchard's node", 'role': 'assistant'}]