The correct answer is [B] Chromium, Copper, and Nickel.

• Electroplating is a process in which a thin layer of metal is deposited on a conductive surface by passing an electric current through a solution containing the metal ions.
• The commonly used metals for electroplating are Chromium, Copper, and Nickel.

Additional Information

1.  Gold, Sodium, and Chromium are not commonly used for electroplating as gold is an expensive metal and sodium is not a metal, it is a chemical element.
2.  Chromium, Copper, and Nickel are commonly used for electroplating as they are conductive and provide good corrosion resistance. Chromium can be used to provide a hard and durable finish, copper is used for electrical conductivity, and nickel is used for corrosion resistance and as a base for other coatings.
3.  Nickel, Lead, and Chromium is not commonly used for electroplating as lead is poisonous and not suitable for electroplating.
4.  Gold, Sodium, and Potassium are not commonly used for electroplating as gold is expensive and sodium and potassium are not metals.

In summary, Chromium, Copper, and Nickel are commonly used for electroplating as they are conductive and provide good corrosion resistance.

The correct answer is [B] Chromium, Copper and Nickel