Assertion (A): We should keep in mind that the membership of the UN Security Council was expanded from 11 to 15 in 1965.
Reason (R): UN General Assembly members now are developing countries.
In the context of the above two statements which one of the following is correct?

A. Both (A) and (R) are individually 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

Answer: Option A