What are the products of the following combustion reaction? 2C2H2(g) + 5O2(g) → C4H2(g) + H2O2(g) + 4O2(g) 4C(s) + 2H2O(g) + 4O2(g) 4CO2(g) + 2H2O(g) 4CO2(g) + H2O(g) + 2O2(g)