The number of $2-$ centre $-2-$ electron and $3-$ centre $-2-$ electron bonds in $B_2H_6$, respectively, are

  • [JEE MAIN 2019]
  • A

    $2$ and $1$

  • B

    $4$ and $2$

  • C

    $2$ and $2$

  • D

    $2$ and $4$

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