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
Gelle's test is for: 
Select and explain. 
A. Otosclerosis, B. NHL, C. Sensorineural deafness, D. None
A: Otosclerosis
Answer: A: Otosclerosis 
Explanation: (a) Otosclerosis(Ref. Dhingra, 6th ed., 22)Gelle's is negative in otosclerosis, i.e. change in the pressure of EAC does not produce any change in hearing as Ossicular chain is already fixed.