Bessemerisation is carried out for:
$I$: $Fe$
$II$: $Cu$
$III$: $Al$
$IV$: Silver

Which of the following is $NOT$ used for the extraction of $Al$?

The correct statement$(s)$ related to the metal extraction processes is(are):
$(A)$ $A$ mixture of $PbS$ and $PbO$ undergoes self-reduction to produce $Pb$ and $SO_2$.
$(B)$ In the extraction process of copper from copper pyrites,silica is added to produce copper silicate.
$(C)$ Partial oxidation of sulphide ore of copper by roasting,followed by self-reduction produces blister copper.
$(D)$ In the cyanide process,zinc powder is utilized to precipitate gold from $Na[Au(CN)_2]$.

Bell metal is an alloy of

Match List-$I$ with List-$II$ and select the correct answer using the codes given below the list.

List-$I$	List-$II$
$1. Ti$	$A. \text{Bauxite}$
$2. Si$	$B. \text{Cerussite}$
$3. Al$	$C. \text{Van-Arkel method}$
$4. Pb$	$D. \text{Zone refining}$

Stainless steel is an alloy of