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Which commercially available form of iron is the most highly purified?

1. Pig iron
2. Wrought iron
3. Cast iron
4. Scrap iron and pig iron

Correct answer: Wrought iron

Solution

Wrought iron is the most highly purified form of iron, characterized by its low carbon content and the absence of impurities, making it malleable and ductile, unlike pig iron and cast iron which contain higher levels of carbon and other elements.

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