If the lattice constant of this semiconductor is decreased,then which of the following is correct?

Electrical conductivity of a semiconductor:

When the electrical conductivity of a semiconductor is due to the breaking of its covalent bonds,then the semiconductor is said to be

At absolute zero temperature,pure silicon behaves as

Choose the correct statement. In conductors,

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.