Which of the following is the correct descending order of atomic radius for the given elements?

B>Al>Ga>In

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In>Ga>Al>B

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Al>Ga>In>B

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In>B>Ga>Al

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Solution

The correct option is A
B>Al>Ga>In

All the given elements belong to group 13.
Since atomic radius increases down the group. So, the correct order is
$B > A l > G a > I n .$

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