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: Radiology
Most common cause of osteoblastic bone metastais 
Select and explain. 
A. Renal cell carcinoma, B. Prostaic carcinoma, C. Wilm's tumor, D. Neuroblastoma
B: Prostaic carcinoma
Answer: B: Prostaic carcinoma 
Explanation: Prostate carcinoma-M/c osteoblastic.