which of the following is an isomer of ch3-ch2-cooh?

Question

CH3 - C - OH - CH3

CH3 - CO - O - CH3

CH3 - CO - CO - CH3

CH3 - CH2 - CO2 - CH3

Answer 1

CH3 - CO - O - CH3 would be an isomer of CH3CH2COOH.

Both have the formula of C3H6O2.