Select the correct option regarding the processes used during metal extraction from their ores.

Which of the following is $NOT$ used for the extraction of $Al$?

Match the alloys in Column $A$ with their uses in Column $B$:

Column $A$	Column $B$
$(1)$ Stainless steel	$(a)$ Riveting
$(2)$ Bronze	$(b)$ Making artifacts
$(3)$ Nitinol	$(c)$ Making coins
$(4)$ German silver	$(d)$ Making musical instruments
	$(e)$ Making surgical instruments

Percentage of silver in German silver is (in $\%$)

Which among the following statement$(s)$ is(are) true for the extraction of aluminium from bauxite?
$A$. Hydrated $Al_2O_3$ precipitates,when $CO_2$ is bubbled through a solution of sodium aluminate.
$B$. Addition of $Na_3AlF_6$ lowers the melting point of alumina.
$C$. $CO_2$ is evolved at the anode during electrolysis.
$D$. The cathode is a steel vessel with a lining of carbon.

List-$I$ contains different compounds formed during the extraction of metal $(M)$ in List-$II$. Match the compounds in List-$I$ with the corresponding metal and process in List-$II$.

List-$I$	List-$II$
$(P). [M(CN)_2]^-$	$(1). Ni$ (during refining of metal)
$(Q). [M(CO)_4]$	$(2). Ti$ (during refining of metal)
$(R). MI_4$	$(3). Pb$ (during roasting of ore)
$(S). MO$	$(4). Ag$ (during leaching of ore)