Doping intrinsic Silicon with Arsenic as an impurity

• A. Only increases the conductivity of Silicon by increasing the number of free electrons available
• B. Produces a semi-conductor in which the charge carriers are predominantly electrons but holes are also present
• C. Produces a semi-conductor in which the charge carriers are predominantly holes but free electrons also present
• D. Produces a semi-conductor in which the charge carriers contain nearly equal number of electrons and holes