Assertion: When the radius of a copper wire is doubled, its specific resistance gets increased.
Reason: Specific resistance is independent of cross-section of material used

Options

A. Both (A) and (R) are true and (R) is the correct explanantion of A.
B. Both (A) and (R) are true but (R) is not the correct explanation of A.
C. (A) is true but (R) is false
D. (A) is false but (R) is true.

Answer

D