question_answer

Directions : In the following question more than one of the answers given may be correct. Select the correct answer and mark it according to the code:

If an increasing temperature, the resistance decreases, then it is (1) superconductor         (2) insulator (3) semiconductor           (4) None of these

A)   1, 2 and 3 are correct

B)  1 and 2 are correct

C)   2 and 4 are correct

D)  1 and 3 are correct