question_answer

Directions: In the following questions, a statement of Assertion (A) is followed by a statement of Reason (R). Mark the correct choice as: Assertion (A): The temperature coefficient of resistance is always positive only for metals. Reason (R): On increasing the temperature, the resistance of metals and alloys increases.

A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A)        

B) Both Assertion (A) and Reason (R) are true but Reason (R) is not the correct explanation of Assertion (A)

C) Assertion (A) is true but Reason (R) is false             

D) Assertion (A) is false and Reason (R) is also false