The correct decreasing order of priority...

The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is

A

`- SO_3 H, - COOH, - CONH_2, - CHO`

B

`-CHO , - COOH, - SO_3 H, - CONH_2`

C

`-CONH_2, - CHO, -SO_3H, - COOH`

D

`- COOH, - SO_3H, - CONH_2, - CHO`

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The correct Answer is:

A

By IUPAC system.

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