1.

According to CIP rule, the correct arrangment in order of decreasing priority is :-

Answer»

`–OH GT –CH_(2)OH gt –CHO gt –COOH `
`–OH gt –COOH gt –CHO gt –CH_2OH `
`–COOH gt –OH gt –CHO gt –CH_(2)OH `
`–COOH gt –CHO gt –CH_(2)OH gt –OH`

ANSWER :D


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