In context with the industrial preparation of hydrogen water gas $(CO+H_2)$, Which of the following is the correct statement ?

Question

$\begin{array}{1 1}\text{$H_2$ removed through occlusion with Pd} \\ \text{$CO$ is oxidised to $CO_2$ with steam in the presence of catalyst followed by absorption of $CO_2$ in alkali}\\\text{$CO$ and $H_2$ are fractionally separated using differences in their densities } \\ \text{$CO$ is removed by absorption in aqueous $CU_2CL_2$ solution } \end{array} $