Consider the following metallurgical processes`:` `(I)` Heating impure metal with `CO` and distilling the resulting volatile carbonyl `(b.p. 43^(@)C)` and finally decomposition at `150^(@)-200^(@)C` 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 obtain the metal. The processes used for obtaining magnesium , nickel and copper are respectively.A. `(I),(II)` and `(III)`B. `(II),(III)` and `(I)`C. `(III),(I)` and `(II)`D. `(II) ,(I)` and `(III)`

Consider the following metallurgical processes`:` `(I)` Heating impure

1.	Consider the following metallurgical processes`:` `(I)` Heating impure metal with `CO` and distilling the resulting volatile carbonyl `(b.p. 43^(@)C)` and finally decomposition at `150^(@)-200^(@)C` 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 obtain the metal. The processes used for obtaining magnesium , nickel and copper are respectively.A. `(I),(II)` and `(III)`B. `(II),(III)` and `(I)`C. `(III),(I)` and `(II)`D. `(II) ,(I)` and `(III)`
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