Assertion (A): Diamond behaves like an insulator.
Reason (R): There is a large energy gap between the valence band and the conduction band of diamond.
a) Both A and R are true, and R is the correct explanation 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.
