Which of the following is absent in frog?

External ear

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Middle ear

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Internal ear

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None of the above

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Solution

The correct option is C External ear
The external ear is absent in frogs and the only tympanum can be seen externally. Middle ear, named as the tympanic activity is filled with air. It passes vibrations to the internal ear or membranous labyrinth. It is present in fluid-filled otic or auditory capsule. So, the correct answer is option A.

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