What is the Minimum Number of Oxygen Atoms Present in an Ester

Question

What is the minimum number of oxygen atoms present in an ester?
A) 1
B) 2
C) 3
D) 4

Accepted Answer

Esters have the general formula RCOOR', indicating the presence of two oxygen atoms: one in the carbonyl group (C=O) and another in the ether linkage (O-R').