Match the items in Column $I$ with its main use listed in Column $II$.

Column $I$	Column $II$
$A$. Silica gel	$i$. Transistor
$B$. Silicon	$ii$. Ion-exchanger
$C$. Silicone	$iii$. Drying agent
$D$. Silicate	$iv$. Sealant

• A
  $A-iii, B-i, C-iv, D-ii$
• B
  $A-iv, B-i, C-ii, D-iii$
• C
  $A-ii, B-i, C-iv, D-iii$
• D
  $A-ii, B-iv, C-i, D-iii$