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
Commonest type of Ano rectal abscess is ? 
Select and explain. 
A. Ischio rectal, B. Submucous, C. Pelvi-rectal, D. Perianal
D: Perianal
Answer: D: Perianal 
Explanation: Ans. is 'd' i.e., Perianal