Which of the following equations represents Photosynthesis?

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.

Photosynthesis can be represented using a chemical equation.

The overall balanced equation is

               $6\mathrm{CO}2 + 6H2O \to \mathrm{Sunlight} C6H12O6 + 6O2Source of Carbon \& Oxygen + Source of Electrons \& Hydrogen + Energy that drives Photosynthesis ----> Sugar + Gas produced by splitting water.$

Where 

CO2 = carbon dioxide 

H2O = water
C6H12O6 = glucose 

O2 = oxygen.