Galvanized iron is the term for iron coated with zinc.

• A. Copper-coated steel
• B. Zinc-coated stainless
• C. Galvanized iron
• D. Nickel-coated iron

Answer: (C)

Galvanization means coating iron with zinc to protect it from rust. The zinc coating serves as a barrier to moisture and, if the coating is scratched and the iron is exposed, zinc acts as a sacrificial anode and corrodes in place of the iron. This dual protection—physical barrier plus zinc’s preferential corrosion—gives long-lasting rust resistance, which is why iron or steel is referred to as galvanized when it has a zinc coating. The other options describe coatings with copper, nickel, or using stainless-related materials, which are different approaches and don’t define galvanizing.