<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 72-year-old man of Asian descent seeks evaluation at your medical office and is frustrated about the frequency he wakes up at night to urinate. He comments that he has stopped drinking liquids at night, but the symptoms have progressively worsened. The physical examination is unremarkable, except for an enlarged, symmetric prostate free of nodules. Which of the following should you prescribe based on the main factor that contributes to the underlying pathogenesis?? A: Finasteride, B: Phenylephrine, C: Leuprolide, D: Prazosin, E: Tamsulosin,  <response>: This is a question about benign prostatic hyperplasia BPH in an older man. The key clues are the age, enlarged prostate on exam, and nocturia. BPH causes bladder outlet obstruction, leading to urinary frequency, urgency, nocturia, and other urinary symptoms. The treatment options listed are medications used for BPH and urinary symptoms. Finasteride blocks conversion of testosterone to DHT, which contributes to prostate enlargement. Prazosin is an alpha blocker that relaxes prostate smooth muscle. Tamsulosin is a selective alpha blocker. Leuprolide suppresses testosterone, shrinking the prostate. Phenylephrine is not used for BPH.Based on the pathogenesis being enlargement of the prostate itself, the best answer is finasteride to block the hormone effects that lead to prostate growth. A: Finasteride 