Choose the correct alternative from the following : - Assertiona (A) : Telephone wires sag more in summer.
Reason (R) : They expand due to summer heat.

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

Assertion (A) : The steam engine was invented by James Watt.
Reason (R) : There was a problem of taking out water from flooded mines.

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

Choose the correct alternative from the following : - Assertion (A) : When the bus starts, the person inside it falls forward.
Reason (R) : The bus pushes the man forward.

E. BOTH A AND R ARE FALSE.

Choose the correct alternative from the following : - Assertion (A) : DDT has nowadays lost its use as an insecticide.
Reason (R) : DDT is harmful to man.

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

Choose the correct alternative from the following : - Assertion (A) : Carbon forms the largest number of compounds.
Reason (R) : Carbon has the catenation property.

D. A IS FALSE BUT R IS TRUE.