Match the following: List I List II A. On-off 1. steam kettle with different settings B. Proportional 2. Elevator C. Cascade 3. Robot-positioning D. Digital 4. Domestic Refrigerator

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