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The charge of the blast furnace consists of

A. Calcined ore (8 parts), coke (4 parts) and limestone (1 part)

B. Calcined ore (4 parts), coke (1 part) and limestone (8 parts)

C. Calcined ore (1 part), coke (8 parts) and limestone (4 parts)

D. Calcined ore, coke and limestone all in equal parts

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