Assertion (A): All squares are rectangles. Reason (R): All rectangles have four sides. Which of the following is correct?

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

Assertion (A): All dogs are mammals. Reason (R): Mammals are animals that give live birth. Which of the following is correct?

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

Assertion (A): All squares are rectangles. Reason (R): Rectangles have four right angles. Which of the following is correct?

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

D. A IS FALSE, BUT R IS TRUE.