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
Osteoblastic secondaries arises from: March 2003 
Select and explain. 
A. Renal carcinoma, B. Thyroid carcinoma, C. GIT carcinoma, D. Prostate carcinoma
D: Prostate carcinoma
Answer: D: Prostate carcinoma 
Explanation: Ans. D i.e. Prostate carcinoma Metastases to bones are usually osteolytic. Osteoblastic lesions are uncommon.