This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolic Bone Disease, Subject name: Orthopaedics
[{'content': 'Sclerosis of bone is seen in all except: \nSelect and explain. \nA. Flurosis, B. Osteopetrosis, C. Secondaries from prostate, D. Hyperparathyroidism', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans: d (Hyperparathyroidism)Ref: Apley's, 8th ed, p. 125, 147-148, 194, 123", 'role': 'assistant'}]