Which best represents the overall equation for photosynthesis?
a. 6 CO2 + 12 H2O + Light energy → C6H12O6 + 6 O2
b. 6 CO2 + 6 H2O + Light energy → C6H12O6 + 6 O2
c. 6 CO2 + Light energy → C6H12O6 + 6 O2 + 6 H2O
d. C6H12O6 + 6 O2 + 6 H2O + Light energy → 6 CO2 + 12 H2O