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 location of anorectal fistula 
Select and explain. 
A. Intersphincteric, B. Transsphincteric, C. Suprasphincteric, D. Extrasphincteric
A: Intersphincteric
Answer: A: Intersphincteric 
Explanation: Park classification of anorectal fistula is
Type 1. Intersphincteric - most common
Type 2. Transsphincteric
Type 3. Suprasphincteric
Type 4. Extrasphincteric