Which of the following methods is suitable for preventing an iron frying pan from rusting? 1. Applying grease 2. Applying paint 3. Applying a coating of zinc 4. All of the above

Answer is (c) Applying a coat of zinc

Though applying grease and applying paint do prevent iron from rusting, we cannot apply these methods on a frying pan. Hence, applying a coat of zinc is the most appropriate method to prevent an iron pan from rusting.