Which of the following is not an ore?

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(D) Pig iron is the most impure form of iron and contains the highest proportion of carbon $(2.5 - 4\%)$. It is a manufactured product,not a naturally

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Pig iron

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(D) Pig iron is the most impure form of iron and contains the highest proportion of carbon $(2.5 - 4\%)$. It is a manufactured product,not a naturally occurring mineral or ore.Malachite is an ore of copper with the formula $Cu(OH)_2 \cdot CuCO_3$.Zinc blende is an ore of zinc with the formula $ZnS$.Bauxite is an ore of aluminium with the formula $Al_2O_3 \cdot 2H_2O$.

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