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
[{'content': 'Rollover phenomenon in audiometry is seen in \nSelect and explain. \nA. Cochlear lesions, B. Retro-cochlear lesions, C. Lesion in inferior colliculus, D. Lesion in medial geniculate body', 'role': 'user'}, {'content': 'Answer: B \nExplanation: 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 .', 'role': 'assistant'}]