Exess of KI reacts with `CuSO_(4)` solution and then `Na_(2)S_(2)O_(3)` solution is added to it. Which of the following statement is incorrect for this reaction ?
A. Evolved `I_(2)` is reduced
B. `CuI_(2)` is formed
C. `Na_(2)S_(2)O_(3)` is oxidised
D. `Cu_(2)I_(2)` is formed