(1) Liquation is used for purification of low melting metals
(2) Oxidation is used when the impurities have lesser affinity for oxygen
(3) Hydraulic washing is used for concentration of magnetic ores
(4) Distillation is used for purification of low boiling volatile metals
$\begin{array}{1 1} (1) ,(2) and (4) only \\ All \;are\; correct \\ (2)\;and \;(4) \;only \\ (D) (1) and (4) Only.\end{array}$
