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': "Which of the following crystals may give rise to pseudo neuropathic arthropathy resembling Charcot's joint - \nSelect and explain. \nA. Monosodium uratehydroxy apatite o, B. Hydroxy apatite, C. Calcium oxalate, D. Calcium pyrophosphate dihydrate", 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]