Which of the following species have the same bond order ?

$\mathrm{Bond} \mathrm{order}=\frac{1}{2}\left({\mathrm{N}}_{\mathrm{b}}-{\mathrm{N}}_{\mathrm{a}}\right)$

$$\begin{gathered} {\mathrm{O}}_2^{-} : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{z}}^1 \\ \mathrm{B}.\mathrm{O}=\frac{10-7}{2}=1.5 \end{gathered}$$

$$\begin{gathered} {\mathrm{CN}}^{-}\left(14{\mathrm{e}}^{-}\right) : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2 \\ \mathrm{B}.\mathrm{O}=\frac{10-4}{2}=3 \end{gathered}$$

$$\begin{gathered} {\mathrm{CN}}^{+}\left(12{\mathrm{e}}^{-}\right) : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2 \\ \mathrm{B}.\mathrm{O}=\frac{8-4}{2}=2 \end{gathered}$$

$$\begin{gathered} {\mathrm{NO}}^{+}\left(14{\mathrm{e}}^{-}\right) : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2 \\ \mathrm{B}.\mathrm{O}=\frac{10-4}{2}=3 \end{gathered}$$

$$\begin{gathered} {\mathrm{NO}}^{-}\left(16{\mathrm{e}}^{-}\right) : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^1\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{z}}^1 \\ \mathrm{B}.\mathrm{O}=\frac{10-6}{2}=2 \end{gathered}$$