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': "Charcot's joint in diabetes affects commonly - \nSelect and explain. \nA. Shoulder joint, B. Knee joint, C. Hip joint, D. Tarsal joint", 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer- D. Tarsal joint Tabes dorsalis - Knees, hip & ankles', 'role': 'assistant'}]