1.

Which of the following is a pair of functional isomers ?

Answer»

`CH_(3) COCH_(3) , CH_(3) CHO`
`C_(2) H_(5) CO_(2) H , CH_(3) CO_(2) CH_(3)`
`C_(3) H_(5) CO_(2) H , CH_(3) CO_(2) C_(2) H_(5)`
`CH_(3) CO_(2) H , CH_(3) CHO`

Answer :B


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