Consider the following statements regarding the raw material requirements of the iron and steel industry: 1. Coking coal is used as a reducing agent as well as a source of heat in the blast furnace. 2. Limestone is added to the blast furnace to act as a flux to remove impurities like silica. 3. Manganese is used to strengthen steel and remove oxygen and sulfur during the smelting process. Which of the statements given above are correct?

Options:

• A: 1 and 2 only
• B: 2 and 3 only
• C: 1, 2 and 3
• D: 1 and 3 only

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