Which of the following statement is correct?

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The space within cochlea called scala media is filled with endolymph.

The vestibular apparatus is composed of two semicircular canals and the otolith organ consisting of the saccule and utricle.

The external auditory meatus helps in equalizing the pressures on either sides of the ear drum.

The membranes constituting cochlea, the reissner's and basilar, divide the surrounding perilymph filled bony labyrinth into an upper scala tympani and a lower scala vestibuli.

answer is A.

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Detailed Solution

The vestibular apparatus is composed of three semicircular canals and the otolith organ consisting of the saccule and utricle. The eustachian tube helps in equalizing the pressures on either sides of the ear drum. The membranes constituting cochlea, the reissner's and basilar, divide the surrounding perilymph filled bony labyrinth into an upper scala vestibuli and a lower scala tympani.

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