The Eustachian tube is supported by which type of cartilage?

Which is thickened to form the organ of Corti?

The site from which the nerve impulse for hearing originates is:

Wax gland present in the human ear canal is called

The diagram shows a cross-section of the human cochlea. Which one of the following options correctly identifies the three parts labeled $A$,$B$,and $C$?

Which of the following is not involved in the mechanism of hearing?