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: ENT
[{'content': 'Facial recess or the posterior sinus is bounded by: \nSelect and explain. \nA. Medially by the veical pa of VII nerve, B. Laterally by the chorda tympani, C. Above by the fossa includis, D. All of the above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Facial recess or Posterior sinus - It is a depression in the posterior wall of the middle ear. It is bounded by: Medially - Veical pa of VIII nerve Laterally - Chorda tympani Above - Fossa incudis', 'role': 'assistant'}]