This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy (Prostate & Seminal Vesicales), Subject name: Surgery
[{'content': 'Normal level of PSA in male is? \nSelect and explain. \nA. < 4 ng/ml, B. 4-10 ng/ml, C. >10 ng/ml, D. PSA is not produced by normal males', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) < 4 ng/mlREF: Bailey and love 24th ed p. 1383PSA Levels<4ng/mlNormal4-10 ng/mlBPH and carcinoma both>10 ng/mlApprox. 75% will have cancer', 'role': 'assistant'}]