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': 'All are causes of sensorineural deafness Except - \nSelect and explain. \nA. Old age, B. Cochlear otosclerosis, C. Loud sound, D. Rupture of tympanic membrane', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]