1.

Tautomerism is possible in (1) CH_(3) - CHO""(3) H-CHO (2) CH_(3)-CO-CH_(3)""(4) (CH_(3))_(3)C-CHO

Answer»

`1, 2`
`2 , 3`
` 3 , 4`
` 1, 2, 4`

ANSWER :A


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