JEE Main 2023 Chemistry question

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 used for volumetric analysis, its concentration should be checked before the use. Reason R: On aging, KOH solution absorbs atmospheric . In the light of the above statements, choose the correct answer from the options given below:

• (A)Both A and R are correct but R is not the correct explanation of ACorrect
• (B)Both A and R are correct and R is the correct explanation of A
• (C)A is correct but R is not correct
• (D)A is not correct but R is correct