Answer : The correct option is, (3) an Arrhenius acid
Explanation :
According to the Arrhenius concept, an acid is a substance which ionizes in the water to give hydronium ion \((H_3O^+)\) or hydrogen ion \((H^+)\) and a base is a substance which ionizes in the water to give hydroxide ion \((OH^-)\).
When one compound dissolves in water, then only positive ion produced in the solution is \((H_3O^+)\). This compound is classified as an Arrhenius acid.
Hence, the correct option is, (3) an Arrhenius acid
