During photosynthesis, plants absorb light energy from the Sun and convert it into chemical energy in the form of glucose. Which compounds combine in the presence of sunlight to form glucose?

Pick from:
[i] carbon dioxide (CO2) and hydrogen (H2);
[ii] oxygen (O2) and carbon dioxide (CO2);
[iii] carbon dioxide (CO2) and water (H2O);
[iv] oxygen (O2) and water (H2O);
[iii]