NEET 2022 Chemistry question on p-Block Elements

1. A.
   The bond orders of $\text{O}_2^+$, $\text{O}_2$, $\text{O}_2^-$ and $\text{O}_2^{2-}$ are 2.5, 2, 1.5 and 1, respectively
2. B.
   $\text{C}_2$ molecule has four electrons in its two degenerate molecular orbitals
3. C.
   $\text{H}_2^+$ ion has one electron
4. D.
   $\text{O}_2^+$ ion is diamagnetic

[NEET 2022]