Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A): An aqueous solution of KOH when for volumetric analysis, its concentration should be checked before the use.
Reason (R): On aging, KOH solution absorbs atmospheric CO$$_2$$.
In the light of the above statements, choose the correct answer from the options given below.

A

(A) is not correct but (R) is correct

B

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

C

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

D

(A) is correct but (R) is not correct explanation of (A)