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': "High-frequency audiometry is used in - \nSelect and explain. \nA. Otosclerosis, B. Ototoxicity, C. Non-organic hearing loss, D. Meniere's disease", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]