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 normal in: \nSelect and explain. \nA. Multiple myeloma., B. Paget's disease., C. Fibrous dysplasia., D. All of the above.", 'role': 'user'}, {'content': "Answer: A \nExplanation: Serum alkaline phosphatase elevated in:\nPaget's disease.\nFibrous dysplasia.\nHyper parathyroidism (Brown’s tumour)\nNote: Serum alkaline phosphatase level is normal in multiple myelomaQ", 'role': 'assistant'}]