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: Pathology
[{'content': "Serum alkaline phosphatase level is reduced in: \nSelect and explain. \nA. Paget's disease., B. Hyperparathyroidism., C. Hypothyroidism., D. Fibrous dysplasia.", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]