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
[{'content': 'Prostatic carcinoma commonly arises from:March 2012 \nSelect and explain. \nA. Central zone, B. Peripheral zone, C. Transitional zone, D. None of the above', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans: B i.e. Peripheral zoneZones of prostate & clinical impoanceCentral zone (CZ) lies posterior to the urethral lumen & above the ejaculatory ducts.Peripheral zone (PZ) lies posteriorly & from this, most carcinoma arisesThere is a periurethral transitional zone (TZ), from which most benign prostatic hyperplasia (BPH) arises.', 'role': 'assistant'}]