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
70 year old man with Ca.prostate with osteoblastic secondaries in pelvis and lumbar veebra showed well differentiated Adeno Carcinoma prostate on needle biopsy. He is idealy treated by - 
Select and explain. 
A. Radical prostectomy, B. TURP, C. Radiation, D. Hormonal manipulation
D: Hormonal manipulation
Answer: D: Hormonal manipulation 
Explanation: Ans. is 'd' i.e., Hormonal manipulation