Match the following items of List-I with those of List-II
\(\begin{array}{|c|c|c|c|}
\hline & \text { List I } & & \text { List II } \\
\hline(\mathrm{A}) & \text { Nickel } & \text { (1) } & \text { Electrolytic refining } \\
\hline \text { (B) } & \text { Titanium } & \text { (2) } & \text { Zone refining } \\
\hline(\mathrm{C}) & \text { Germanium } & (3) & \text { van-Arkel method } \\
\hline \text { (D) } & \text { Copper } & (4) & \text { Mond process } \\
\hline
\end{array}\)
The correct answer is

1. A \(\begin{array}{cccc}\mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} \\ 4 & 1 & 3 & 2 \end{array}\)
2. B \(\begin{array}{cccc}\mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} \\ 3 & 4 & 2 & 1 \end{array}\)
3. C \(\begin{array}{cccc}\mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} \\ 4 & 3 & 2 & 1\end{array}\)
4. D \(\begin{array}{cccc}\mathrm{A} & \mathrm{B} & \mathrm{C} & \mathrm{D} \\ 2 & 1 & 4 & 3\end{array}\)