Answer: (c) Electroless plating technique
Electroless plating is used to deposit metals on non-conductive substrates like glass, ceramic, and plastic because it does not require electrical connections or a power source.
Key advantages:
- Works on non-conductive materials
- No need for external electrical connections
- Provides uniform thickness coverage
- Suitable for complex shapes and surfaces
Other techniques (electroplating, silk plating, gas plating) require conductive substrates or other specific conditions not suitable for glass, ceramic, and plastic.