<prompt> Most common site of prostate carcinoma is -Anterior zonePeripheral zoneCentral zoneTransitional zone  <response>: Ans. is b i.e., Peripheral zone o Surgical Anatomy of Prostate Prostate is divided into following 3 zones:o Peripheral zone which lies in the outer part of prostate but mainly posteriorly.o Central zone: tvhich lies posterior to the urethral lumen and above the ejaculatory ducts as they pass through the prostate.o Periurethral transitional zone TZo Carcinoma arise most commonly from - Peripheral zoneo Benign prostatic hyperplasia arise from - Transitional zoneo As BHP arises from transitional zone and prostatectomy done for BHP removes TZ leaving behind the PZ. The pt. is still at risk for prostatic carcinoma. 