Which of the following is paramagnetic with bond order 0.5

$$\begin{gathered} {\mathrm{O}}_2 : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^1\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{z}}^1 \\ \mathrm{B}.\mathrm{O}=\frac{10-6}{2}=2 ; \mathrm{paramagnetic} \end{gathered}$$

$$\begin{gathered} {\mathrm{F}}_2 : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }*2{\mathrm{p}}_{\mathrm{z}}^2 \\ \mathrm{B}.\mathrm{O}=\frac{10-8}{2}=1 ; \mathrm{diamagnetic} \end{gathered}$$

$$\begin{gathered} {\mathrm{N}}_2 : \mathrm{\sigma }1{\mathrm{s}}^2\mathrm{\sigma }*1{\mathrm{s}}^2\mathrm{\sigma }2{\mathrm{s}}^2\mathrm{\sigma }*2{\mathrm{s}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{y}}^2\mathrm{\pi }2{\mathrm{p}}_{\mathrm{z}}^2\mathrm{\sigma }2{\mathrm{p}}_{\mathrm{x}}^2 \\ \mathrm{B}.\mathrm{O}=\frac{10-4}{2}=3 ; \mathrm{diamagnetic} \end{gathered}$$

${\mathrm{H}}_2^{+} : \mathrm{\sigma }1{\mathrm{s}}^1 ; \mathrm{B}.\mathrm{O}=\frac{1-0}{2}=0.5 ; \mathrm{paramagnetic}$