The correct decreasing order of priority for the functional group 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_(3)H,-COOH`
D. `-COOH,-SO_(3)H,-CONH_(2),-CHO`
