Name the only metal that is antibacterial.

Options

A. Sodium
B. Copper
C. Iron
D. Aluminium

Answer

B

Explanation

Copper and its alloys (brasses, bronzes, cupronickel, copper-nickel-zinc, and others) are natural antibacterial materials. Ancient civilizations exploited the antibacterial properties of copper long before the concept of microbes became understood in the nineteenth century.