Which of the following statements is/are correct?

• A

  The oxidation states of N in NH₃, HN₃, and N₂H₄ are -3, -1/3, and -2 respectively

• B

  The oxidation states of N in NO₂, N₂O₄, and ${{\mathrm{NO}}_2}^{⊝}$ are +4, +4 and +3, respectively

• C

  The oxidation states of N in NH₂OH, NO, and HNO₃ are -1, +2, and +5, respectively

• D

  The oxidation states of N in N₂O and HCN are +1 and -3, respectively