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': 'Most common site of chronic fissure in ano \nSelect and explain. \nA. Anterior, B. Anterolateral, C. Posterior, D. Lateral', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Chronic fissure in ano will present as skin tags in posterior anal canal.', 'role': 'assistant'}]