Answer: Option (c) is the correct answer.
Step-by-step explanation:
Esters have a chemical formula as RCOOR'.
where, R and R' can either be different or same groups. These are polar in nature.
Esters have low molecular weight and hence they are used as fragrances. Esters have a fruity smell and for this reason, they are widely used in perfumes, cosmetics, synthetic flavors etc.
Thus, we can conclude that esters are the class of organic compound is commonly used in perfumes.