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
Rinne's test is negative in 
Select and explain. 
A. Presbycusis, B. CSOM, C. Labyrinthitis, D. Meniere's disease
B: CSOM
Answer: B: CSOM 
Explanation: A negative Rinne test is seen in conductive deafness - when bone conduction is greater than air conduction. Chronic suppurative otitis media is a disease of the middle ear and hence causes conductive deafness. (Ref: Diseases of EAR, NOSE AND THROAT by PL DHINGRA - 6th Edition. Page no. 22)