In the Reaction, HSO₄^-(aq) + OH^-(aq) SO₄^2-(aq) + H₂O(l)

In the reaction, HSO₄^-(aq) + OH^-(aq) SO₄^2-(aq) + H₂O(l) , the conjugate acid-base pairs are

A) HSO₄^- and SO₄^2-; H₂O and OH^-.
B) HSO₄^- and H₃O⁺; SO₄^{2 -} and OH^-.
C) HSO₄^- and OH^-; SO₄^{2 -} and H₂O.
D) HSO₄^- and H₂O; OH ^- and SO₄^2-.
E) HSO₄^- and OH^-; SO₄^{2 -} and H₃O⁺.