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': "Herbeden's ahropathy affects \nSelect and explain. \nA. Lumbar spine, B. Symmetrically large joints, C. Sacroiliac joints, D. Distal interphalangeal joints", 'role': 'user'}, {'content': "Answer: D \nExplanation: Answer is D (Distal interphalangeal joints) Herbeden's nodes or bony enlargement of distal interphalangeal joints are the most common form of idiopathic osteoahritis Bouchard's nodes lierbeden's nodes Bony enlargement of PIP joint in Bony enlargement of DIP joint in osteoahritis", 'role': 'assistant'}]