Answer: Option (B) is the correct answer.
Explanation:
A hydronium ion is an ion that contains three hydrogen atoms and one oxygen atom. Formula of a hydronium ion is [tex]H_{3}O^{+}[/tex].
Whereas water is a molecular compound with chemical formula [tex]H_{2}O^[/tex].
Hydroxide ion has formula [tex]OH^{-}[/tex] and a hydrogen ion has formula [tex]H^{+}[/tex].
Therefore, we can conclude that out of the given options [tex]H_{3}O^{+}[/tex] is a hydronium ion.
