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': 'Best management of urethral structure which measures about 2 cm in length is \nSelect and explain. \nA. Internal optical urethrotomy, B. Substitution  urethrotomy, C. End to end urethroplasty, D. None of the above', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Management of Urethral structure :\n\n< 1.5 cm\xa0⇒ Internal optical\xa0\xa0urethrotomy (structure divided at 12 O\xa0clock position).\n1.5 - 3 cm\xa0⇒ End to end\xa0urethroplasty.\n> 3 cm\xa0⇒ Substitution urethroplasty.', 'role': 'assistant'}]