Match the following: List I List II A. Silicon 1. is trivalent B. Arsenic 2. rarely used as semiconductor C. Indium 3. is pentavalent D. Germanium 4. intrinsic semiconductor

• A-1, B-2, C-3, D-4
• A-4, B-3, C-2, D-1
• A-4, B-3, C-1, D-2
• A-2, B-1, C-3, D-4