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
Rectal examination should not be done - 
Select and explain. 
A. Anal fissure, B. Fistual in ano, C. Prolapsed piles with bleeding, D. Anal stenosis
A: Anal fissure
Answer: A: Anal fissure 
Explanation: None