which equation best represents conservation matter?

Question

3H2O+3CO↓2→C↓6H2O↓6+6O↓2

6H2O+10CO↓2→C↓H2O↓+4O↓2

6H2O+6CO↓2→C↓3H↓6O↓3+3O↓2

6H2O+6CO↓2→C↓3H↓6O↓3+3O

Answer 1

The equation that best represents conservation of matter is:

6H2O+6CO2→C3H6O3+3O2