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Given below are two statement: one is labelled as Assertion A and the other is labelled as Reason R: Assertion A: Na+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that of Na+. Reason R: The magnitude of effective nuclear charge on the outer shell electrons in Al3+ is less than that in Na+. In the light of the above statements, choose the correct answer from the options given below:
A
A is true but R is false.
B
A is false but R is true.
C
Both A and R are true and R is the correct explanation of A.
D
Both A and R are true but R is NOT the correct explanation of A.
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