Q.

The relative stability of ‘+1’ oxidation state of group ‘13’ elements follow the order 

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a

 Al < Ga < Tl < In

b

Tl < In < Ga < Al

c

Al < Ga < In < Tl

d

Ga < Al < In < Tl

answer is C.

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Detailed Solution

Down the group in ‘p’ block stability of lower oxidation state increases due to inert pair effect

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