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: Anatomy
What is true about ischiorectal fossa - 
Select and explain. 
A. Apex is formed by obturator internus, B. Levator ani forms the roof, C. Lateral wall is formed by inferior pubic ramus, D. Communicates with the other side posteriorly
D: Communicates with the other side posteriorly
Answer: D: Communicates with the other side posteriorly 
Explanation: There is communication posteriorly between two Ischiorectal fossae, behind the anal canal.