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': 'Radical mastoidectomy includes all except - \nSelect and explain. \nA. Closure of the auditory tube, B. Ossicles removed, C. Cochlea removed, D. Exteriorisation of mastoid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: In radical mastoidectomy, structure of middle ear cleft are removed, not inner ear (e.g. cochlea).', 'role': 'assistant'}]