The decreasing order of priority for the following functional groups in the $IUPAC$ Nomenclature is $-SO_3H$,$-CN$,$-COOH$,$-OH$,$-CHO$.

  • A
    $-COOH > -SO_3H > -CN > -CHO > -OH$
  • B
    $-SO_3H > -COOH > -CN > -CHO > -OH$
  • C
    $-COOH > -SO_3H > -CHO > -CN > -OH$
  • D
    $-SO_3H > -COOH > -CHO > -CN > -OH$

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