Choose the correct alternative from the following : - Assertion (A) : We prefer to wear white clothes in winter.
Reason (R) : White clothes are good reflectors of heat.

D. A IS FALSE BUT R IS TRUE.

Choose the correct alternative from the following : - Assertion (A) : Vaccines prevent diseases.
Reason (R) : Vaccines must be given to children.

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

Assertion (A) : Increase in carbon dioxide would melt polar ice.
Reason (R) : Global temperature would rise.

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

Choose the correct alternative from the following : - Assertion (A) : Uranium undergoes nuclear fusion reaction.
Reason (R) : It has a big, unstable nucleus.

D. A IS FALSE BUT R IS TRUE.

Choose the correct alternative from the following : - Assertion (A) : An atom is neutral despite the charged particles in it.
Reason (R) : The neutrons do not have any charge.

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