This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
Most common site for anal fissure is 
Select and explain. 
A. 3 O' clock, B. 6 O' clock, C. 2 O' clock, D. 10 O' clock
B: 6 O' clock
Answer: B: 6 O' clock 
Explanation: An anal fissure (synonym: fissure-in-ano) is a longitudinal split in the anoderm of the distal anal canal (Fig. 69.24), which extends from the anal verge proximally towards, but not beyond, the dentate line.most common site for anal fissure is 6 O&; clock Ref: Bailey & Love&;s Sho Practice of Surgery,E25,Page-1251