The correct answer is: B. Chromium, Copper and Nickel.
Electroplating is a process of depositing a thin layer of metal onto a surface. The metal to be deposited is called the “anode” and the surface to be coated is called the “cathode”. The anode and cathode are placed in an electrolyte, which is a solution that contains ions of the metal to be deposited. A current is passed through the electrolyte, which causes the metal ions to migrate to the cathode and be deposited on the surface.
The metals commonly used for electroplating are chromium, copper, and nickel. Chromium is used to provide a protective coating that resists corrosion. Copper is used to provide a good electrical conductor. Nickel is used to provide a hard, wear-resistant coating.
The other options are incorrect because they do not include all of the metals commonly used for electroplating. Option A does not include nickel. Option C does not include chromium. Option D does not include copper.