Answer: Option (a) is the correct answer.
Explanation:
According to Bronsted-Lowry, acid are the species that give hyrogen or [tex]H^{+}[/tex]) ions into a solution.
For example, [tex]HCl \rightarrow H^{+} + Cl^{-}[/tex]
Whereas bases are the species that release hydroxide or [tex]OH^{-}[/tex] ions into a solution.
Thus, we can conclude that acids release hydrogen ions in solution.