Which type of semiconductor is formed when germanium is doped in the gallium ?

N -type semiconductors will be obtained, when germanium is dopped with

The n-type semiconductor is obtained when Si is doped with

What types of semi-conductors will be formed when silicon is doped with Indium ?

Name the types of semiconductors produced when germanium (Ge) is doped separately with boron (B) and arsenic (As). Which one will be a better semiconductor and why ?