Which of the following has largest bond angle?

The bond angle ${\mathrm{NO}}_2^{+},{\mathrm{NO}}_2$, and ${\mathrm{NO}}_2^{-}$ are $180°,134°$ and $115°$ respectively ${\mathrm{NO}}_2^{+}$, and ${\mathrm{NO}}_2^{-}$ undergoes, sp and ${\mathrm{sp}}^2$ hybridization respectively.