Which amongst the following is an incorrect statement?
- A$C_{2}$ molecule has four electrons in its two degenerate $\pi$ molecular orbitals.
- B$H_{2}^{+}$ ion has one electron.
- C$O_{2}^{+}$ ion is diamagnetic.
- DThe bond orders of $O_{2}^{+}, O_{2}, O_{2}^{-}$ and $O_{2}^{2-}$ are $2.5, 2, 1.5$ and $1,$ respectively.
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