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
Most common site of chronic fissure in ano 
Select and explain. 
A. Anterior, B. Anterolateral, C. Posterior, D. Lateral
C: Posterior
Answer: C: Posterior 
Explanation: Chronic fissure in ano will present as skin tags in posterior anal canal.