Correct Answer: Option B

Explanation

Rust on a metal sheet contains iron oxide, which is a compound made of iron, oxygen, and hydrogen: 

• Chemical formula: The chemical formula for rust is Fe\(_2\)O\(_3\).x H\(_2\)O also known as hydrated Iron(III) oxide.
• The chemical equation for the rusting of iron is

                               4Fe + 3O\(_2\) + xH\(_2\)O → 2Fe\(_2\)O\(_3\)⋅xH\(_2\)O

There is an explanation video available below.

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