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
Investigation of choice for posterior urethral value is 
Select and explain. 
A. Cystourethroscopy, B. Retrograde urethroscopy, C. Micturating cystourethrogram, D. Cystoscopy
C: Micturating cystourethrogram
Answer: C: Micturating cystourethrogram 
Explanation: Micturating cystourethrogram is investigation of choice for posterior urethral value.