GaAs is

Which of the following substances has an energy gap $(E_g)$ greater than $3 \ eV$?

Assertion: If the temperature of a semiconductor is increased,then its resistance decreases.
Reason: The energy gap between the conduction band and the valence band is very small.

Assertion : The resistivity of a semiconductor increases with temperature.
Reason : The atoms of a semiconductor vibrate with larger amplitude at higher temperatures,thereby increasing its resistivity.

This question has Statement $1$ and Statement $2$. Of the four choices given after the Statements,choose the one that best describes the two Statements.
Statement $1$ : $A$ pure semiconductor has a negative temperature coefficient of resistance.
Statement $2$ : On raising the temperature,more charge carriers are released into the conduction band.

The energy gaps $(E_g)$ between the valence band and conduction band for diamond, silicon, and germanium are in the order: