The bond order is maximum in

  • [AIIMS 1983]
  • [AIPMT 1994]
  • [AIIMS 1985]
  • A

    ${O_2}$

  • B

    $O_2^{ - 1}$

  • C

    $O_2^{ + 1}$

  • D

    $O_2^{ - 2}$

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