Are the hairlike cells in the cochlea mechanoreceptors, thermoreceptors, or chemoreceptors?

The hairlike cells in the cochlea are Mechanoreceptors

Option A

Explanation:

The cochlea is present as a spiral structure within the inner ear. The vibrating movements of the fluid stimulate the hair-like processes of the sensory cells of the cochlea. It creates an impulse which is transmitted to the brain through the auditory nerve.

In the organ of corti, the one which contains hair cells called stereocilia. It has got microvilli like structures arranged in order. The hair cell is a mechano receptors which combines different sounds  and hence hearing happens .

sodium i think the chemical element of atomic number 11, a soft silver-white reactive metal of the alkali metal group.