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
Unilateral hydronephrosis is due to ? 
Select and explain. 
A. Bladder neck contracture, B. Stricture urethra, C. Carcinoma of prostate, D. All
C: Carcinoma of prostate
Answer: C: Carcinoma of prostate 
Explanation: Ans. is c i.e. Carcinoma prostate