The correct balanced chemical equation for the combustion of crystalline C6H12O6 (glucose) in oxygen is:

C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g)

This equation indicates that one molecule of glucose reacts with six molecules of oxygen to produce six molecules of carbon dioxide and six molecules of water vapor. The combustion of glucose is an exothermic process, meaning that it releases heat energy.