1 MCQs in ENT for NEET PG
A 2-month-old infant fails bilateral otoacoustic emissions (OAE) and auditory brainstem response (AABR) on universal newborn hearing screening. Imaging shows normal cochlear anatomy. Genetic testing reveals biallelic GJB2 mutations. The clinical presentation shown as **A** in the diagram — bilateral profound congenital sensorineural hearing loss (DFNB1) — results from disruption of which physiological process in the inner ear?
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