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
Rollover phenomenon in audiometry is seen in 
Select and explain. 
A. Cochlear lesions, B. Retro-cochlear lesions, C. Lesion in inferior colliculus, D. Lesion in medial geniculate body
B: Retro-cochlear lesions
Answer: B: Retro-cochlear lesions 
Explanation: Roll over phenomenon:- it is seen in retro cochlear hearing loss . With increase in intensity above paicular level phonetically balanced score (PB score) falls rather than maintain a plateau as in cochlear type of sensineural hearing loss .