How does an intrinsic semiconductor behave at $0 \ K$?

In a semiconductor,

At absolute zero,$Si$ acts as

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.

Sodium has a body-centered cubic $(BCC)$ packing. If the distance between two nearest atoms is $3.7 \mathring{A}$,then its lattice parameter is.....$\mathring{A}$

What is the band gap energy for Germanium $(Ge)$?