Consider the following chemical reaction: aFe2O3 (s) + bCO(g) → cFe (s) + dCO2In the balanced chemical equation of the above, which of the following will be the values of the coefficients a, b, c and d respectively?

• A. 3, 2, 3, 1
• B. 1, 3, 2, 3
• C. 2, 3, 3, 1
• D. 3, 3, 2, 1