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According to molecular orbital theory wh...

According to molecular orbital theory which of the following is correct `:`

A

LUMO level for `C_2` molecule is `sigma_(2p_x)` orbital

B

In `C_2` molecules both the bonds are `pi` bonds

C

In `C_2^(2-)` ion there is one `sigma` and two `pi` bonds

D

All the above are correct

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The correct Answer is:
D
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