The starting material for the manufacture of $KMnO_4$ is

Consi der the following metallurgical processes

$(I)$ Heating impure metal with $CO$ and distilling the resulting volatile carbonyl (b.p. $43\,^oC$ ) and finally decomposition at $150^o-200\,^oC$ to get the pure metal

$(II)$ Heating the sulphide ore in air until a part is converted to oxide and then further heating in the absence of air to let the oxide react with unchanged metal sulphide

$(III)$ Electrolysis of the molten electrolyte containing approximately equal amounts of the metal chloride and $NaCl$ to obtained the metal

The processes used for obtaining magnesium, nickel and copper are respectively

Given below are two statements :

Statement $I :$ Colourless cupric metaborate is reduced to cuprous metaborate in a luminous flame.

Statement $II :$ Cuprous metaborate is obtained by heating boric anhydride and copper sulphate in a non-luminous flame.

In the light of the above statements, choose the most appropriate answer from the options given below.

Which alloy contains $Cu, Sn$ and $Zn$

In liquation process used for tin $(Sn)$, the metal