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': "Delorme's Procedure is used for - \nSelect and explain. \nA. Rectal prolapse, B. Solitary rectal ulcer, C. Rectal bilharziasis, D. Proctalgia fugax", 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]