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: Unknown
[{'content': 'A 20-yrs-old man suffers an injury to the posterior urethra. After appropriate initial management and follow-up care of this injury, the most likely late complication is: \nSelect and explain. \nA. Ascending urinary tract infection, B. Retrograde ejaculation, C. Sterility, D. Urethral stricture', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Initial management involves passage of catheters through the urethral meatus and through an incision in the bladder.\nAfter this has been accomplished, a Foley catheter is threaded through the urethra into the bladder and left in situ. Urethral healing occurs as the hematoma resolves, but a posterior urethral stricture is not uncommon. If the stricture is not managed appropriately, ascending urinary tract infection may result.', 'role': 'assistant'}]