According to $MOT$ which of following is correct

  • A

    $LUMO$ level for $C_2$ molecule is $\sigma 2p_x$ orbital

  • B

    In $C_2$ molecule both bounds are $\pi $ bonds

  • C

    In $C_2^{-2}$ ion there is one $\sigma $ and two $\pi $ bonds

  • D

    All above are correct

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  • [JEE MAIN 2019]