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
[{'content': 'What is true about ischiorectal fossa - \nSelect and explain. \nA. 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', 'role': 'user'}, {'content': 'Answer: D \nExplanation: There is communication posteriorly between two Ischiorectal fossae, behind the anal canal.', 'role': 'assistant'}]