Which of the following species exhibits the diamagnetic behaviour?

The electronic configuration of given species are as follows: 

$\begin{array}{l}{\mathrm{O}}_2^{2-};\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}(\sigma 2\mathrm{s}{)}^2{\left({\sigma }^{\ast }2\mathrm{s}\right)}^2{\left(\sigma 2{\mathrm{p}}_z\right)}^2{\left(\pi 2{\mathrm{p}}_x\right)}^2{\left(\pi 2{\mathrm{p}}_y\right)}^2{\left({\pi }^{\ast }2{\mathrm{p}}_x\right)}^2{\left({\pi }^{\ast }2{\mathrm{p}}_y\right)}^2\\ {\mathrm{O}}_2^{+}\text{and NO }\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}(\sigma 2\mathrm{s}{)}^2{\left({\sigma }^{\ast }2\mathrm{s}\right)}^2{\left(\sigma 2{\mathrm{p}}_z\right)}^2{\left(\pi 2{\mathrm{p}}_x\right)}^2{\left(\pi 2{\mathrm{p}}_y\right)}^2{\left({\pi }^{\ast }2{\mathrm{p}}_x\right)}^1\\ {\mathrm{O}}_2;\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}\hspace{0.25em}(\sigma 2\mathrm{s}{)}^2{\left({\sigma }^{\ast }2\mathrm{s}\right)}^2{\left(\sigma 2{\mathrm{p}}_z\right)}^2{\left(\pi 2{\mathrm{p}}_x\right)}^2{\left(\pi 2{\mathrm{p}}_y\right)}^2{\left({\pi }^{\ast }2{\mathrm{p}}_x\right)}^1{\left({\pi }^{\ast }2{\mathrm{p}}_y\right)}^1\end{array}$

Hence, ${\mathrm{O}}_2^{2-}$ is diamagnetic as it does not contain unpaired electron.