Which equation best represents conversation of matter?

A) 6H2O + 6CO2 right arrow C3H603 + 3O2
B) 6H2O + 6CO2 right arrow C6H12O6 + 602
C) 6H20 + 10CO2 right arrow C6H12O6 + 402
D) 3H2O + 3CO2 right arrow C612O6 + 602

I'm confused, please someone help asap! Ty!