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': 'The most impoant use of transrectal ultarsonography (TRUS) is for - \nSelect and explain. \nA. Screening for Ca prostate, B. Distinguishing prostate cancer from BPH, C. Systematic prostate biopsy in suspected prostate cancer, D. Guiding transurethral resection of prostate cancer', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Systematic prostate biopsy in suspected prostate", 'role': 'assistant'}]