Assertion (A): Validity is a prerequisite for a test to be sound
Reason (R): Validity indicates the extent to which the test measures what it intends to measure, when compared with some outside independent criterion

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 A