Ionic radius (in $A^{o}$ ) of $A s^{3 +}, S b^{3 +}$ and $B i^{3 +}$ follow the order :

S b^{3 +} > B i^{3 +}

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S b^{3 +} > B i^{3 +} > A s^{3 +}

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B i^{3 +} > A s^{3 +} > S b^{3 +}

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B i^{3 +} > S b^{3 +} > A s^{3 +}

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Solution

The correct option is D $B i^{3 +} > S b^{3 +} > A s^{3 +}$
ionic radius is directly proportional to molar mass in a group

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