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

Question

−COOH, −SO₃H, −CONH₂, −CHO

−SO₃H, −COOH, −CONH₂, −CHO

−CHO, −COOH, −SO₃H, −CONH₂

−CONH₂, −CHO, −SO₃H, −COOH

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