In frog, 'fenestra ovalis' is

Options

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

Answer

A

Explanation

Fenestra ovalis' is an oval aperture through which tympanic cavity is connected with auditory capsule which houses the internal ear.