Assertion (A): Reading improves vocabulary. Reason (R): People who read often have larger vocabularies than those who do not.

A. BOTH A AND R ARE TRUE, AND R IS THE CORRECT EXPLANATION OF A.

Assertion (A): The sun rises in the east. Reason (R): The earth rotates on its axis from west to east.

A. BOTH A AND R ARE TRUE, AND R IS THE CORRECT EXPLANATION FOR A.

Assertion (A): All squares are rectangles. Reason (R): Rectangles have four sides of equal length.

B. BOTH A AND R ARE TRUE, BUT R IS NOT THE CORRECT EXPLANATION FOR A.

Assertion (A): All birds can fly. Reason (R): Penguins are birds. Which of the following is correct?

D. A IS FALSE, BUT R IS TRUE.

Assertion (A): All mammals are warm-blooded. Reason (R): Some mammals can survive in extreme cold environments. What is the relationship between A and R?

B. A IS TRUE, R IS TRUE, BUT R IS NOT THE CORRECT EXPLANATION OF A.