Correct Option: D

Copper is not an alloy; it is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. It is used as a constituent of various metal alloys, such as sterling silver used in jewellery, cupronickel used to make marine hardware and coins, and constant an used in strain gauges and thermocouples for temperature measurement. The alloys are:–
➤ Steel is an alloy of iron and other elements, primarily carbon;
➤ Brass is a metal alloy made of copper and zinc; l Bronze is an alloy consisting primarily of copper, commonly with about 12% tin.