The correct decreasing order of priority of functional groups in naming an organic compound as per $IUPAC$ system of nomenclature is:

  • A
    $-COOH > -CONH_2 > -COCl > -CHO$
  • B
    $-SO_3H > -COCl > -CONH_2 > -CN$
  • C
    $-COOR > -COCl > -NH_2 > C=O$
  • D
    $-COOH > -COOR > -CONH_2 > -COCl$

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