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': 'Indication of surgery in benign hyperplasia of prostate is \nSelect and explain. \nA. Post void urine volume is 200 ml, B. Weakened urinary stream, C. Dysuria, D. Residual urine < 100 ml', 'role': 'user'}, {'content': "Answer: A \nExplanation: Indications for surgery in BPH are: * Prostatism *Acute retentionof 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'}]