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: Anatomy
[{'content': 'Which of the following is an absolute indication for surgery in cases of benign prostatic hyperplasia - \nSelect and explain. \nA. Bilateral hydroureteronephrosis, B. Nocturnal frequency, C. Recurrent urinary tract infection, D. Voiding bladder pressures > 50 cm of water', 'role': 'user'}, {'content': "Answer: C \nExplanation: Absolute indications for surgical treatment of BPH 1) Refractory urine retention (failing at least one attempt at catheter removal 2) Recurrent UTI from BPH 3) Bladder stones d/t BPH 4) Renal insufficiency d/t BPH 5) Large bladder diveicula secondary to BPH 6) Recurrent gross hematuria from BPH Ref : Cambell's Urology 8/e p1340", 'role': 'assistant'}]