The correct answer is option 1: Silver and Copper. Both silver and copper are known for their excellent thermal conductivity properties, making them very good conductors of heat.

Silver is one of the best thermal conductors among all metals. It has the highest thermal conductivity of any elemental metal. This means that it can conduct heat very efficiently, allowing it to quickly transfer heat from one location to another.

Copper is also a highly efficient conductor of heat. It has the second-highest thermal conductivity among pure metals, making it an excellent choice for applications where heat needs to be transferred or dissipated efficiently.

Therefore, silver and copper are both widely used in various industries, including electronics, electrical wiring, and heat sinks, where the efficient conduction of heat is crucial for the performance and reliability of devices.

Alert - Correct answer should be option 1: Silver and Copper.