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': 'Rectal examination should not be done - \nSelect and explain. \nA. Anal fissure, B. Fistual in ano, C. Prolapsed piles with bleeding, D. Anal stenosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]