Class 11 NEET Biology Structural Organisation in Animals

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Question : 85 of 100

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In frog, "fenestra ovalis" is

(1997)

the communication between the pharynx and the tympanic cavity
the external opening of the tympanic cavity which is covered by the tympanic membrane
the air filled cavity of the middle ear
the opening in the auditory capsule which separates the middle ear from the internal ear.

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