Which set of products is most likely to result from the combustion reaction shown below?           c4h8(l)  +  6o2(g)   

The answer would be: carbon dioxide(CO2) and water (H2O).

The combustion of methane gas family typically will result in carbon dioxide and water. It will need many oxygen gases to do the combustion. The reaction equation would be: 

C4H8(l) + 6O2(g)  ==> 4CO2 + 4H2O

Change in speed or direction : )