Electrochemistry

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 \(\mathrm{KOH}\) when used for volumetric analysis, its concentration should be checked before the use.

Reason (R) : On aging, \(\mathrm{KOH}\) solution absorbs atmospheric \(\mathrm{CO}_{2}\).

In the light of the above statements, choose the correct answer from the options given below :