In which of the following$\mathrm{O}-\mathrm{N}-\mathrm{O}$ bond angle is highest?

Triangular bipyramidal shape .Since ${{\mathrm{NO}}^{+}}_2$ only has 2 bonds and no lone pair is available, the bond angle is 180 degrees, hence ${{\mathrm{NO}}^{+}}_2$ should have a bigger bond angle than${\mathrm{NO}}_2^{-}$ . Whereas in the case of ${\mathrm{NO}}_2$, the angle is less than 180 degrees because there is a lone pair with a bond pair ${\mathrm{NO}}_2^{-}$ . Thus, has a smaller bond angle than ${{\mathrm{NO}}^{+}}_2$ .