Assertion (A): The level of difficulty of a test item should be adaptable to the level of understanding of the examinees
Reason (R): The exact decision regarding the difficulty value of an item can be taken only after some statistical techniques have been applied

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 a correct explanation of A

C. A is true but R is false

D. A is false but R is true

Answer: Option B