Match the following processes in List-$I$ with their respective applications in List-$II$:

List-$I$	List-$II$
$A$. Van Arkel method	$P$. Purification of titanium
$B$. Solvay process	$Q$. Manufacture of $Na_2CO_3$
$C$. Bassemerisation	$S$. Reduction of copper
$D$. Hall-Herault process	$R$. Reduction of aluminium

• A
  $A-P, B-Q, C-S, D-R$
• B
  $A-Q, B-P, C-R, D-S$
• C
  $A-S, B-Q, C-P, D-R$
• D
  $A-R, B-P, C-Q, D-S$