<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 73-year-old man presents to his primary care physician complaining of increased urinary frequency, nocturia, and incomplete emptying after void. He is otherwise healthy, with no active medical problems. On examination, a large, symmetric, firm, smooth prostate is palpated, but otherwise the exam is normal. Which of the following is a potential complication of the patients present condition?? A: Prostate cancer, B: Hydronephrosis, C: Bladder cancer, D: Prostatitis, E: Renal cancer,  <response>: This is a question about benign prostatic hyperplasia BPH. The patient is an older man with urinary symptoms such as increased frequency, nocturia, and incomplete emptying, and has an enlarged prostate on exam. These symptoms and findings are classic for BPH. The potential complications of BPH include obstruction leading to urinary retention, bladder stones, recurrent urinary tract infections, and hydronephrosis. Hydronephrosis refers to distension and dilation of the renal pelvis and calyces due to obstruction of urine outflow, often from BPH.Prostate cancer can also cause urinary symptoms, but it would not present with a symmetrically enlarged prostate on exam like described here. The other answer choices are incorrect because prostatitis, bladder cancer, and renal cancer are not potential complications of BPH.Therefore, the correct answer is B, hydronephrosis, as it is a potential complication of this patients benign prostatic hyperplasia.B: Hydronephrosis 