This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'In follow up of BPH, most impoant indication of surgery is \nSelect and explain. \nA. Prostate size >75gm, B. Single episode of UTI requiring 3 day antibiotics, C. Cannot use medication due to hypeension, D. Bilateral hydronephrosis', 'role': 'user'}, {'content': "Answer: D \nExplanation: Indications for surgery in BPH are: * Prostatism *Acute retention of urine *Chronic retention of urine with residual urine > 200ml*Complications like hydroureter, hydronephrosis, stone formation, recurrent infections, bladder changes.*HematuriaReference : page 1045 SRB's manual of surgery 5th edition", 'role': 'assistant'}]