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': 'Tegmen seperates middle ear from the middle cranial fossa containing temporal lobe of brain by - \nSelect and explain. \nA. Medical wall of middle ear, B. Lateral wall of middle ear, C. Roof of middle ear, D. Anterior wall of middle ear', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The roof of middle ear is formed by a thin plate of bone called tegmen tympani. It separates tympanic cavity from middle cranial fossa.\nTegmen tympani is formed by squamous and petrous part of temporal bone.Q', 'role': 'assistant'}]