Carbon, silicon and germanium have four valence electrons each. At room temperature which one of the following statements is most appropriate?

Options

1. AThe number of free conduction electrons is significant in C but small in Si and Ge .
2. BThe number of free conduction electrons is negligible small in all the three.
3. CThe number of free electrons for conduction is significant in all the three.
4. DThe number of free electrons for conduction is significant only in Si and Ge but small in C .