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': 'Osteoblastic secondaries arises from: March 2003 \nSelect and explain. \nA. Renal carcinoma, B. Thyroid carcinoma, C. GIT carcinoma, D. Prostate carcinoma', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D i.e. Prostate carcinoma Metastases to bones are usually osteolytic. Osteoblastic lesions are uncommon.', 'role': 'assistant'}]