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': 'Investigation of choice for posterior urethral value is \nSelect and explain. \nA. Cystourethroscopy, B. Retrograde urethroscopy, C. Micturating cystourethrogram, D. Cystoscopy', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Micturating cystourethrogram is investigation of choice for posterior urethral value.', 'role': 'assistant'}]