Which part's function is transmission of sound vibrations to the internal ear?

Correct option is C

Ans. (c)
Sol. The tympanic membrane, also known as the eardrum, is a thin membrane that vibrates in response to sound waves. These vibrations are transmitted to the ossicles (malleus, incus, and stapes), which further conduct them to the inner ear (cochlea) for sound processing.
Explanation of each option:
· (a) Eustachian tube – Connects the middle ear to the nasopharynx and helps equalize air pressure, but does not transmit sound.
· (b) Vestibule – Part of the inner ear involved in balance, not in sound conduction.
· (c) Tympanic membrane – Correct answer. It vibrates with sound waves and initiates mechanical conduction to the inner ear.
· (d) Auricle – The outer part of the ear, helps collect and direct sound into the ear canal but doesn’t transmit vibrations to the inner ear directly.