The tendency to form monovalent compounds among the Group $13$ elements is correctly exhibited in :

  • [NEET 2017]
  • A

    $B < Al < Ga < In < Tl$

  • B

    $Tl < In < Ga < Al < B$

  • C

    $Tl \approx In < Ga < Al < B$

  • D

    $B \approx Al \approx Ga \approx In \approx Tl$

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  • [AIEEE 2008]

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