Excess of `KI` reacts with `CuSO_(4)` solution and `Na_(2)SO_(3)` solution is added to it. Which of the following statements in incorrect for the reaction?
A. `Cu_2I_2` is reduced
B. Evolved `I_2` is reduced
C. `Na_2S_2O_3` is oxidised
D. `CuI_2` is formed