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: Surgery
[{'content': 'All of the following produce Osteoblastic secondaries except - \nSelect and explain. \nA. Ca Prostate, B. Carcinoid tumors, C. Ca Breast, D. Multiple myeloma', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Multiple myeloma Multiple myeloma causes purely osteolytic lesions with little or no osteoblastic component (punched out lesion)", 'role': 'assistant'}]