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{:("Column-I", "Column-II"),((A) O(2)^(+...

`{:("Column-I", "Column-II"),((A) O_(2)^(+),(P) "bond order "gt=1),((B) He_(2)^(+) ,(Q) "Paramagnetic "),((C)C_(2)^(2-) ,(Q) "Homonuclear atomic orbital combine with each other "),((D) NO, (S) "Outermost electron in antibonding molecular orbital "):}`

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The correct Answer is:
A-PRT; B-PT; C-PS; D-RS
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