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 chethral stricture is 
Select and explain. 
A. Retrograde Urethrogram, B. Anterograde Urethrogram, C. IV Pydogram, D. Ascending Urethrogram
B: Anterograde Urethrogram
Answer: B: Anterograde Urethrogram 
Explanation: Investigation of choice :
a) Anterior Urethral stricture ⇒ Retrograde Urethrogram.
b) Posterior Urethral stricture ⇒ Anterograde urethrogram.