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
A 31 year old female patient complains of bilateral impairment of hearing for the 5 year. On examination, tympanic membrane is normal and audiogram shows a bilateral conductive deafness. Impedance audiometry shows As type of curve and acoustic reflexes are absent. All constitute pa of treatment, except: 
Select and explain. 
A. Hearing aid, B. Stapedectomy, C. Sodium fluoride, D. Gentamicin
D: Gentamicin
Answer: D: Gentamicin 
Explanation: Gentamicin is used to treat Meniere's disease.