This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urethra & Penis, Subject name: Surgery
[{'content': 'Most common cause of urethral stricture is: \nSelect and explain. \nA. Trauma, B. Infection, C. Congenital, D. Post endoscopy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) TraumaRef: Campbell Urology 11th Edition, Page 917* Most urethral stricture are result of trauma (usually straddle trauma)', 'role': 'assistant'}]