The most commonly used semiconductor is ________?

A. Germanium
B. Silicon
C. Carbon
D. Sulphur

Commonly used Semiconductors

The most commonly used semiconductor is Silicon. It is a chemical element with the symbol Si and atomic number 14. It is a hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor. It is a member of group 14 in the periodic table: carbon is above it; and germanium, tin, lead, and flerovium are below it. Wikipedia