The Eustachian tube is supported by which type of cartilage?

Which cranial nerve helps in maintaining the balance of the body?

Identify the correct sequence of ear ossicles from the outer ear to the inner ear.

$.....P.....$ ends at the oval window,while $.....Q.....$ ends at the round window,which opens to the middle ear.
$\quad\quad\quad P\quad\quad \quad Q$

The membranous labyrinth is enclosed in the:

The internal ear is filled with: