Pig iron ($8.00\mathrm{kg}$) with $4.20\%$ carbon is converted to wrought iron containing $0.20\%$ carbon, taken here to mean that $4.00\%$ of the original mass is removed as carbon, all by $\mathrm{Fe}{}_2\mathrm{O}{}_3+3\mathrm{C}\to 2\mathrm{Fe}+3\mathrm{CO}$ from the haematite lining (C = 12, Fe = 56, O = 16). The mass of $\mathrm{Fe}{}_2\mathrm{O}{}_3$ consumed, to the nearest gram, is

1. A$4267\mathrm{g}$
2. B$1422\mathrm{g}$
3. C$474\mathrm{g}$
4. D$711\mathrm{g}$