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. Evolved `I_(2)` is reduced
B. `C u l_(2)` is formed
C. `Na_(2)S_(2)O_(3)` is oxidised
D. `Cu_(2)I_(2)` is formed