Select the correct statement(s) from the following. I. In conductor...

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Select the correct statement(s) from the following.
I. In conductors, the valence and conduction bands may overlap.
II. Substances with energy gap of the order of \( 10 \mathrm{eV} \) are insulators.
III. The resistivity of a semiconductor increases with increase in temperature.
IV. The conductivity of a semiconductor increases with increase in temperature.
(a) I and II only
(b) I and III only
(c) I, II and IV
(d) I, II, III and IV
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