How are taste and smell related ?

The receptors of taste and smell are called .

Oily food kept out for few days gives a bad taste and a bad smell because of ______.

Oily food kept out for few days ghives a bad taste and a bad smell because of "_______"

How do we taste food?

Select the option that is related to the third term in the same way as the second term is related to the first term. Nose: Smell:: Ears : ?