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.

Assertion (A): All mammals are warm-blooded animals. Reason (R): Some reptiles can regulate their body temperature. Which of the following is correct?

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

Assertion (A): All mammals are warm-blooded. Reason (R): Warm-blooded animals can regulate their body temperature internally. Which of the following is correct?

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

Assertion (A): All birds can fly. Reason (R): Birds have wings.

D. A IS FALSE, BUT R IS TRUE.

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.