which one of the following is a sweet smelling compound?

a)C2H6O

b)C2H4O2

c)C4H802

d)C4H84

(c)C4H8O2.this is ester;a sweet smelling compound.it is used in making of perfumes and as flavouring agents.ester is the product when ethanoic acid (CH3COOH) reacts with absolute ethanol (CH3CH2OH) in the presence of an acid catalyst.