Which of the following set of equations could be used to represent the standard enthalpy of formation of glucose?

• A.6C _(s) + 6H _2(g) + 3O_2(g) → C ₆H₁₂O_6(s)
• B.6CO_2(g) + 6H₂O _(l) → C₆H₁₂O_6(s) + 6O _2(g)
• C.6C_(g) + 6H _2(g) + 3O_2(g) → C₆H₁₂O _6(s)
• D.6C_(g) + 6H _2(g) + 3O_2(g) → C ₆H ₁₂O _6(aq)