Assertion (A): Painting an iron gate protects it from rusting.
Reason (R): A coat of paint keeps air and moisture from coming in contact with the iron.
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → Both Assertion (A) and Reason (R) are correct, and R is the correct explanation of A.
In an Assertion-Reason question, each statement is checked for truth first, and then R is tested as the cause of what A describes.
Assertion — correct. Painting is one of the simplest ways of preventing rust on iron articles such as gates and grills.
Reason — correct. Iron rusts only when it is in contact with both oxygen (air) and water (moisture); a layer of paint shuts them out.
The gate does not rust because the paint keeps air and moisture away from the iron, so R explains A.