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Match list-I with II and select the correct answer using the codes given below the lists
\begin{tabular}{|l|l|l|l|}
\hline \multicolumn{2}{|c|}{ List-I } & \multicolumn{2}{c|}{ List-II } \\
\hline A. & Van Arkel method & p. & Purification of titanium \\
\hline B. & Solvay process & q. & Manufacture of \( \mathrm{Na}_{2} \mathrm{CO}_{3} \) \\
\hline C. & Cupellation & r. & Purification of copper \\
\hline D. & Polling & s. & Refining of silver \\
\hline
\end{tabular}
(1) A-(p); B-(q); C-(s); D-(r)
(2) A-(q); B-(p); C-(r); D-(s)
(3) A-(s); B-(q); C-(p); D-(r)
(4) A-(r); B-(p); C-(q); D-(s)
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