This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Joint disorders, Subject name: Anatomy
[{'content': 'Heberdens ahropathy affects which joints mainly ? \nSelect and explain. \nA. Lumbar spine, B. Symmetrically large joints, C. Sacroiliac joints, D. Distal interpharyngeal joints', 'role': 'user'}, {'content': 'Answer: D \nExplanation: In osteoahritis of hand Distal interpharyngeal joint-Heberdens node Proximal interpharyngeal joints -Bouchards node Refer Harrinson 20th/e p 2035/ maheswari 9th ed', 'role': 'assistant'}]