Which of the following statement is correct?

A. In conductors., the valence and conduction bonds overlap

B. Substances with energy gap of the order of 2 eV are insulators

C. The resistivity of a semiconductor increases with increase in temperature

D. The depletion layer in the pn-junction region is caused by drift of electrons

Choose the correct answer from the options below

A only

* In conductors, the valence and conduction bands overlap

* (E_g) for insulators > 3 eV

* Resistivity (ρ) of semiconductor ∝ \(\frac{1}{Temperature} \) Number of free electron hole pairs increases with increase in temperature.

* Depletion layer in pn junction diode is formed due to diffusion of electrons from n-type to p-type and holes from p-type to n-type into each others region

Thus, only statement (A) is correct