This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
Gelle test is used for 
Select and explain. 
A. Otosclerosis, B. Noise-induced hearing loss, C. Sensorineural deafness, D. None of the above
A: Otosclerosis
Answer: A: Otosclerosis 
Explanation: Gelle&;s test is performed by placing a vibrating fork on the mastoid while changes in air pressure in the ear canal are brought about by Siegle&;s speculum. The test is positive in otosclerosis.Ref: Hazarika; 3rd ed; Pg 179