Extraction of copper is done from copper pyrites which contain small quantity of :

zinc

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iron

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sodium

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carbon

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Solution

The correct option is A iron
The principle ore of copper is copper pyrite, $C u F e S_{2}$ and copper is extracted from this ore. Large amount of copper are obtained from copper pyrite $(C u F e S_{2})$ by smelting. Iron is present in the ore as trace metal.
Option B is correct.

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