Number of molecules/species from the following having one unparred electron $15$. . . . . .  $\mathrm{O}_2, \mathrm{O}_2^{-1}, \mathrm{NO}, \mathrm{CN}^{-1}, \mathrm{O}_2^{2-}$

  • [JEE MAIN 2024]
  • A

    $1$

  • B

    $2$

  • C

    $3$

  • D

    $4$

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