Which of the following statements is`//`are correct?
A. The oxidation states of `N` in `NH_(3), HN_(3)`, and `N_(2)H_(4)` are `-3, -1//3`, and `-2`, respectively.
B. The oxidation state of `N` in `NO_(2), N_(2)O_(4), and `NO_(2)^(-)` are `+4, +4`, and `+3`, respectively.
C. The oxidation states of `N` in `NH_(2)OH, NO`, and `HNO_(3)` are `-1, +2`, and ` +5`, respectively.
D. The oxidation states of `N` in `N_(2)O` and `HCN` are `+1` and `-3`, respectively.
