Match the following: List I List II A. Copper 1. produces discrete energy level just above valence band B. Rubber 2. produces discrete energy level just below conduction band C. Antimony 3. large forbidden gap D. Boron 4. valence and conduction bands overlap

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