What is the number of unpaired electron(s) in the highest occupied molecular orbital of the following species : $N _2: N _2^{+} ; O _2 ; O _2^{+}$?

  • [JEE MAIN 2023]
  • A

    $0,1,2,1$

  • B

    $2,1,2,1$

  • C

    $0,1,0,1$

  • D

    $2,1,0,1$

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  • [AIPMT 2009]

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  • [JEE MAIN 2019]

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