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Given below are two statements : one is ...

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): The ionic radii of `O^(2-) and Mg^(2+)` are same.
Reason (R): Both `O^(2-) and Mg^(2+)` are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below.

A

Both (A) and (R) are true and (R) is the correct explanation of (A).

B

Both (A) and (R) are true but (R) is not the correct explanation of (A).

C

(A) is true but (R) is false.

D

(A) is false but (R) is true.

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