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 surgery in cases of benign prostatic hyperplasia ? 
Select and explain. 
A. Bilateral hydroureteronephrosis, B. Nocturnal frequency, C. Recurrent urinary tract infection, D. Voiding bladder pressures > 50 cm of water
C: Recurrent urinary tract infection
Answer: C: Recurrent urinary tract infection 
Explanation: Ans. is 'c' i.e. Recurrent urinary tract infection