This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ohopaedics Q Bank, Subject name: Orthopaedics
Which of the following most commonly produces osteoblastic secondaries? 
Select and explain. 
A. Carcinoma lung, B. Carcinoma breast, C. Carcinoma urinary bladder, D. Carcinoma prostate
D: Carcinoma prostate
Answer: D: Carcinoma prostate 
Explanation: Most common tumor producing osteoblastic bone metastasis is carcinoma prostate. Purely Osteoblastic secondaries are produced by Ca.prostate, Ca.Breast, carcinoid tumor and medulloblastoma.