Which of the Following Is the Correct Half-Cell Reaction for the Anode

Multiple Choice

Which of the following is the correct half-cell reaction for the anode process in the electrolysis of an aqueous solution of potassium sulfate?

A) SO₄^2-(aq) $\rightarrow$ SO₂(g) + O₂(g) + 2 e^-
B) H₂O(l) $\rightarrow$ 1/2 O₂(g) + 2 H⁺(aq) + 2 e^-
C) H₂O(l) + 1/2 O₂(g) + 2 e^- $\rightarrow$ 2 OH^-(aq)
D) SO₄^2-(aq) + 4 H⁺(aq) + 2 e^- $\rightarrow$ SO₂(g) + 2 H₂O(l)
E) 3 H₂O(l) + e^- $\rightarrow$ 1/2 H₂(g) + 3 OH^-(aq) + 2 H⁺(aq)