Answer: Option (A) is the correct answer.
Step-by-step explanation:
When two or more elements combine chemically to each other then it results in the formation of a substance known as a compound.
On the other hand, a substance that contains same atoms is known as an element.
For example,
is a diatomic molecule and since it contains more than one atom so it is a compound also.
Therefore, we can conclude that when there is no change to the atoms in the compound then a compound can be treated like an element when balancing chemical equations.