<prompt> Which of the following is an absolute indication for surgery in cases of benign prostatic hyperplasia?Nocturnal frequencyBilateral hydroureteronephrosisRecurrent urinary tract infectionVoiding bladder pressures 50 cm of water  <response>: Bilateral hydroureteronephrosis is an absolute indication for surgery in cases of benign prostatic hyperplasia. Ref: Bailey and Loves Sho Practice of Surgery, 24th Edition, Page 1376. 