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Assertion (A) : Na^+ and Mg^2+ ions are ...

Assertion (A) : `Na^+ and Mg^2+` ions are isoelectronic but the ionic radius of `Na^+` is greater than the of `Mg^2+`. Reason (R) : The effective nuclear charge of `Na^+` ion is less than that of `Mg ^2+` ion.

A

Both A and R are true. R is correct explanation of A.

B

Both A and R are true. R is not correct explanation of A

C

A is true, R is false

D

A is false, R is true

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The correct Answer is:
A
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