(c)
Alcohol + Acid$\ \ \ \rightleftharpoons \ \$Ester(fruity smelling)
ROH RCOOH RCOOR
Alcohol ($C_{2}H_{5}OH$) when react with acid they produce ester and esters have fruity smell.
${\ \ \ \ \ C}_{2}H_{5}OH\ \ \ \ + CH_{3}COOH\ \ \ \rightarrow C_{2}H_{5}COOCH_{3}\ \ \ + H_{2}O$
ethyl alcohol acetic acid fruity smell of ester