This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Otosclerosis, Subject name: ENT
[{'content': 'A 31-year-old female patient complains of B/L impairment of hearing for the past 5 years. Audio- gram shows a B/L conductive deafness. Impedance audiometry is given below. All constitute part of treatment except: \nSelect and explain. \nA. Hearing aid, B. Stapedectomy, C. Sodium fluoride, D. Gentamicin', 'role': 'user'}, {'content': "Answer: D \nExplanation: (d) Gentamicin(Ref. Cummings, 6th ed., 2213)The given tympanogram shows As type of curve and as per the description the diagnosis is clearly otosclerosis.Gentamicin is a vestibulotoxic drug given in Meniere's to relieve vertigo. It has no role in otosclerosis.", 'role': 'assistant'}]