This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Neoplasia), Subject name: Surgery
[{'content': "In old age for rectal prolapse palliative surgery in a patient unfit for surgery is - \nSelect and explain. \nA. Delorme's procedure, B. Well's procedure, C. Thiersch's operation, D. Low anterior resection", 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Thiersch's operation", 'role': 'assistant'}]