This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Prostate & Seminal Vesicles, Subject name: Surgery
Most common bony metastasesis due to which primary? 
Select and explain. 
A. Prostate, B. Kidney, C. Liver, D. Melanoma
A: Prostate
Answer: A: Prostate 
Explanation: Ans. is 'a' i.e., Prostate * Bone is a common site of metastasis for carcinomas of the prostate, breast, lung, kidney, bladder, and thyroid and for lymphomas and sarcomas.* Prostate, breast, and lung primaries account for 80% of all bone metastases.