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Stability order of +3 and +1 states of b...

Stability order of +3 and +1 states of boron family element is
(1) `Ga^(3+) gt In^(3+) gt Tl^(3+)`
(2) Ga^+ gt In^+ gt Tl^+`
(3) `Ga^+ lt In^+ lt Tl^+`
(4) `Ga^(3+) gt Ga^+`

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The correct Answer is:
(1) (3)
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