MCQ
Esters are fiunctional isomers of:
- ✓Hydroxy aldehyde
- BKetone
- CDiketone
- DDiols

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$\mathop {CH_3^ + }\limits_{\rm{I}} $ $\mathop {{H_3}{O^ + }}\limits_{{\rm{II}}} $ $\mathop {N{H_3}}\limits_{{\rm{III}}} $ $\mathop {CH_3^ - }\limits_{{\rm{IV}}} $