Answer: Option (A) is the correct answer.
Explanation:
A chemical reaction is a reaction in which there is formation of a new compound or substance.
For example, [tex]NaOH + HCl \rightarrow NaCl + H_{2}O[/tex]
Also, in a chemical reaction the products formed have different properties than the reactants.
Thus, we can conclude that the substances that are formed describes the products of a chemical reaction.