Answer: Option (3) is the correct answer.
Explanation:
Arrhenius base are defined as the species which dissociate to give hydroxide or [tex]OH^{-}[/tex] ions.
For example, when [tex]Ca(OH)_{2}[/tex] is dissolved in water then it dissociates into [tex]Ca^{2+}[/tex] and [tex]OH^{-}[/tex] ions.
Whereas [tex]CO_{2}[/tex], [tex]CaSO_{4}[/tex], and [tex]C_{2}H_{5}OH[/tex] does not dissociate to give hydroxide ions.
Thus, we can conclude that [tex]Ca(OH)_{2}[/tex] compound is an Arrhenius base.
