Rusting of iron is prevented in galvanisation by coating iron with a layer of

1. The chapter lists methods to prevent rusting. 2. Galvanisation coats iron with zinc. 3. Zinc protects iron even when scratched (sacrificial protection). 4. So option A is correct. _Source: Selina Concise Chemistry Class 10, Ch 7 Metallurgy (Mistral OCR'd PDF), section on prevention of rusting_