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