Malleus is the auditory ossicle attached to the tympanum.
Opsins are a group of proteins made light-sensitive via the chromophore retinal (or a variant) found in photoreceptor cells of the retina.
The Eustachian tube helps maintain equal air pressure on both sides of the eardrum by allowing outside air to enter the middle ear.
The saccule and utricle, together make the otolith organs.
So, the correct answer is-Opsin (of Rhodopsin) develops from vitamin A