Which of the following is the correct decreasing order of atomic radius for following elements?
B, Al, Ga, In

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 B
In>Ga>Al>B

Atomic Radius increases down the group. All the given elements belong to group 13.
Since atomic radius increases down the group, Option B is the correct answer.

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