Group $13$ elements show $+1$ and $+3$ oxidation states. Relative stability of $+3$ oxidation state may be given as

  • A

    $Tl^{3+} > In^{3+} > Ga^{3+} > Al^{3+} > B^{3+}$

  • B

    $B^{3+} > Al^{3+} > Ga^{3+} > In^{3+} > Tl^{3+}$

  • C

    $Al^{3+} > Ga^{3+} > Tl^{3+} > In^{3+} > B^{3+}$

  • D

    $Al^{3+} > B^{3+} > Ga^{3+} > Tl^{3+} > In^{3+}$

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