The Eustachian tube connects $A$ cavity with $B$. Choose the correct option for $A$ and $B$.

The maculae are present on the acoustic ridges which are found in

What are ear ossicles?

Select the correct sequence for the mechanism of hearing.
$I -$ Sound waves,$II -$ Oval window,$III -$ Hair cells press against the tectorial membrane,$IV -$ Auditory cortex,$V -$ Auditory nerve,$VI -$ Waves in lymph,$VII -$ Tympanic membrane,$VIII -$ Movement in basilar membrane,$IX -$ Ear ossicles,$X -$ Generation of nerve impulses.

The organ of Corti in a rabbit is concerned with the sense of

Malleus is a part of