Match List-$I$ with List-$II$.

List-$I$	List-$II$
$A$. Bronze	$I$. $Cu, Ni$
$B$. Brass	$II$. $Fe, Cr, Ni, C$
$C$. $UK$ silver coin	$III$. $Cu, Zn$
$D$. Stainless Steel	$IV$. $Cu, Sn$

Choose the correct answer from the options given below:

In the reaction $4FeCr_2O_4 + 8Na_2CO_3 + 7O_2 \rightarrow X + Y + 8CO_2$,identify $X$ and $Y$.

Given below are two statements:
Statement $I$: During electrolytic refining,the pure metal is made to act as anode and its impure metallic form is used as cathode.
Statement $II$: During the Hall-Heroult electrolysis process,purified $Al_2O_3$ is mixed with $Na_3AlF_6$ to lower the melting point of the mixture.
In the light of the above statements,choose the most appropriate answer from the options given below:

What is the percentage of carbon in mild steel?

What is the appropriate process for the extraction of lead from low-grade ore (impurity level is high)?

Metals are extracted by other methods through the formation of complexes. The complexes formed in these methods are: $I$: Cyanide process,$II$: Mond process,$III$: Photographic fixing process.