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In the equilibrium system described by: PO43-(aq) + H2O(l) ⇌ HPO42-(aq) +OH-(aq) Br∅nsted-Lowry theory would designate: A) HPO42- and H2O as a conjugate pair B) HPO42- and OH- as the acids C) PO43- as amphiprotic D) PO43- and H2O as the bases E) H2O and OH- as a conjugate pair