Which of the following species have the same bond order ?

${\mathrm{CN}}^{-}-14$ electrons ( 6 from carbon, 7 from nitrogen, add 1 for negative charge)
${\mathrm{NO}}^{+}-14$ electrons ( 8 from oxygen, 7 from nitrogen, subtract 1 for positive charge)
${\mathrm{CN}}^{+}-12$ electrons ( 6 from carbon, 7 from nitrogen, subtract 1 for positive charge)
${\mathrm{O}}_2^{-}$- 17 electrons ( 8 from each oxygen, add 1 for negative charge).
Species containing the same number of electrons have the same bond order.