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The correct decreasing order of priority for the functional groups of organic compounds in the IUPAC system of nomenclature is
(a) – CONH2 , – CHO, – SO3H, – COOH
(b) – COOH, – SO3H, – CONH2 , – CHO
(c) – SOH, –COOH, –CONH2 , – CHO
(d) – CHO, –COOH, – SO3H, –CONH2

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(c) : The order of preference of functional groups is as follows:

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