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The ionic radius of Na^(+) ion is 1.02Å....

The ionic radius of `Na^(+)` ion is 1.02Å. The ionic (in A) of `Mg^2 and Al^(3+)`, respectively, are :

A

0.68 and 0.72

B

0.72 and 0.54

C

1.05 and 0.99

D

0.85 and 0.99

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