Metal-metal bonding is more frequent in $4d$ or $5d$ series than in $3d$ series due to

  • A

    their greater enthalpies of atomisation

  • B

    the large size of the orbitals which participates in the metal-metal bond formation

  • C

    their ability to involve both $ns$ and $(n - 1)\,d$ electrons in the bond formation

  • D

    the comparable size of $4d$ and $5d$ series elements

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  • [JEE MAIN 2016]