Excess of KI reacts with $CuSo_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?

Question

$\begin{array}{1 1} (a)\;\text{$Cul_2$ is reduced } \\ (b)\;\text{Evolved $I_2$ is reduced} \\ (c)\;\text{$Na_2S_2O_3$ is oxidied} \\ (d) \text{Cul is formed} \end{array} $