This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': 'Tegmen separates 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 the middle ear is formed by tegmen tympani and it extends posteriorly to form a roof of aditus and antrum. Ref: Dhingra 6th edition', 'role': 'assistant'}]