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': "Ideal management in an old and frail patient presenting with a mass situated 15 cm away from anal orifice: March 2005 \nSelect and explain. \nA. Abdomino-perineal resection, B. Colonoscopic removal, C. Haman's operation, D. Anterior resection", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. C: Haman's operation Haman's operation is an excellent procedure in an old and frail patient who would not stand a lengthy anterior resection, or in whom there is concern about the anal sphincter function or the bility of an anastomosis.", 'role': 'assistant'}]