Which of the following processes for refining of metals involves a principle of selective adsorption of the components from a mixture?

Match the following:
| List-$I$ (Refining Methods) | List-$II$ (Metal to be refined) |
| :--- | :--- |
| $(A)$ Zone refining | $(I)$ Titanium |
| $(B)$ Poling | $(II)$ Tin |
| $(C)$ Liquation | $(III)$ Gallium |
| $(D)$ Vapour phase refining | $(IV)$ Copper |

Which method is used for the refining of silver containing lead as an impurity?

Which process is used for the refining of silver?

The method used for the purification of $Indium$ is ..... .

Which metal is ultrapurified using carbon monoxide?