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
Which of the following is an absolute indication for BPH 
Select and explain. 
A. Prostatitis, B. Voiding bladder pressures>70 cm of water, C. Episode of hematuria, D. Bilateral hydronephrosis
D: Bilateral hydronephrosis
Answer: D: Bilateral hydronephrosis 
Explanation: Indications of prostate surgery in BPH - Acute or Chronic urine retension
Multiple UTI
B/L hydronephrosis
> 1 episode of hematuria
Bladder divertuli.