This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Assessment of patient with prostatism include all except \nSelect and explain. \nA. Rectal examination, B. Serum prostate specific antigen, C. Pressure flow urodynamic studies, D. Transrectal ultrasound scanning', 'role': 'user'}, {'content': "Answer: C \nExplanation: Evaluation of patient with lower urinary tract infection (LUTI) Urine analysis and culture Hemoglobin, total count, ESR, blood urea and serum creatinine Digital examination of rectum (P/R) CNS examination PSA, acid phosphatase Uroflowmetry, flow rate assessment, residual urine analysis US abdomen, IVU to see upper urinary tract, CT abdomen in selected patients only Cystoscopy, transrectal US (TRUS) Prostatic abscess aspiration/drainage through perineal approach under guidance. Ref: SRB's Manual of Surgery 5th edition Pgno : 1048", 'role': 'assistant'}]