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: Pathology
[{'content': 'The most indicative test for prostate cancer is: \nSelect and explain. \nA. A thorough digital rectal examination, B. Magnetic resonance imaging (MRI), C. Excretory urography, D. Prostate-specific antigen', 'role': 'user'}, {'content': 'Answer: D \nExplanation: An elevated prostate-specific antigen level indicates prostate cancer, but it can be falsely elevated if done after the prostate gland is manipulated.\n\nOption A: A digital rectal examination should be done as part of the yearly screening, and then the antigen test is done if the digital exam suggests cancer.\nOption B: MRI is used in staging the cancer.', 'role': 'assistant'}]