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Match items of Column-I with those in Column-II.
Column-I    Column-II
1) Cyanide process   i) Ultrapure $Ge$
2) Froth floatation   ii) Dressing of $ZnS$ process
3) Electrolytic reduction iii) Extraction of $Al$
4) Zone refining    iv) Extraction of $Au$
v) Purification of $Ni$

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$1 \to i, 2 \to ii, 3 \to iii, 4 \to iv$

$1 \to iii, 2 \to iv, 3 \to v, 4 \to i$

$1 \to iv, 2 \to ii, 3 \to iii, 4 \to i$

$1 \to ii, 2 \to iii, 3 \to i, 4 \to v$

answer is C.

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Detailed Solution

The cyanide process is used for the extraction of $Aul$ and $Ag.$
The Froth flotation process is used for dressing of $ZnS$ This process is used for sulfide ores.
Electrolytic reduction is used in the extraction of $Al.$
Zone refining is used to obtain ultrapure $Ge .$

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Column-I	Column-II
1) Cyanide process	i) Ultrapure $Ge$
2) Froth floatation	ii) Dressing of $ZnS$ process
3) Electrolytic reduction	iii) Extraction of $Al$
4) Zone refining	iv) Extraction of $Au$
	v) Purification of $Ni$

Match items of Column-I with those in Column-II.Column-I Column-II1) Cyanide process i) Ultrapure Ge2) Froth floatation ii) Dressing of ZnS process3) Electrolytic reductioniii) Extraction of Al4) Zone refining iv) Extraction of Au v) Purification of Ni