Which of the following is the correct order of priority for groups in $R-S$ nomenclature?

  • A
    $-I > -NO_2 > -CHO > -CH_2CH_3$
  • B
    $-COOH > -CHO > -OH > -CH_3$
  • C
    $-I > -OCH_3 > -COOH > -CHO$
  • D
    $-OH > -NH_2 > -NO_2 > -CH_3$

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