Which One of the Following Equations Represents the Ionization of a Weak

Multiple Choice

Which one of the following equations represents the ionization of a weak monoprotic acid in water

A) HNO₂(aq) + OH^- (aq) $\leftrightharpoons$ H₂O(l) + NO₂^-(aq)
B) HNO₂(aq) + NH₃(aq) $\leftrightharpoons$ NH₄NO₂(aq)
C) HNO₂(aq) + H₂O(l) $\leftrightharpoons$ H₃O⁺(aq) + NO₂^-(aq)
D) HNO₃(aq) + OH^-(aq) $\leftrightharpoons$ H₂O(l) + NO₃^-(aq)
E) NO₂^- (aq) + H₂O(aq) $\leftrightharpoons$ HNO $_2$ (aq) + OH $^-$ (aq)