Assertion (A): In the periodic table of chemical elements, election affinity is always found to increase from top to bottom in a group.Reason (R): In a group, the atomic radii generally increase from top to bottom.

• 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 the correct explanation of A
• C. A is true but R is false
• D. A is false but R is true