Answer:
Option D) CH3COOCH3
Explanation:
Esters are organic compounds having the general formula R'COOR where R' and R are alkyl groups which may be the same or different.
Option A CH3OH is an alcohol with general formula ROH.
Option B CH3COOH is a carboxylic acid with general formula RCOOH.
Option C CH3OCH3 is an ether which have general formula has R'OR.
Option D CH3COOCH3 is an ester with a general formula of R'COOR