the correct decreasing order of priority of functional groups in naming an organic compound as per iupac system of nomenclature is:
A. -CHO, - COOH, -SO₃H−CONH₂
B. − CONH₂, - CHO, -SO₃H, - COOH
C. -COOH, -SO₃H,− CONH₂, -CHO
D. -SO₃H, -COOH, − CONH₂, -CHO