Match the term with its' proper chemical equation.
a) Oxidation: Fe2O3 + 3CO → 2Fe + 3CO2
b) Combustion: CH4 + 2O2 → CO2 + 2H2O
c) Neutralization: HCl + NaOH → NaCl + H2O
d) Photosynthesis: 6CO2 + 6H2O → C6H12O6 + 6O2