This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Orthopaedics
[{'content': 'Heberden done 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: In osteoahritis of hand:Distal interphalangeal joint: Heberden's nodeProximal interphalangeal joint: Bouchard's node(Refer: Mohindra's Fundamentals of Ohopedics, 2nd edition, pg no. 88, 101, 127)", 'role': 'assistant'}]