1.

The correct decreasing order of preference of functional groups during the IUPAC nomenclature of polyfunctional compounds is:

Answer»

` -COOH,-SO_(3)H,-CONH_(2),-CHO`
`-SO_(3)H,-COOH,-CONH_(2),-CHO`
`-CHO,-COOH,-SO_(3)H,-CONH_(2)`.
`-CONH_(2),-CHO,-SO_(3)H,-COOH`

Answer :A


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