Which of the following is a correct chemical equation for the incomplete combustion of C2H6?

A: C2H6 + 2O2 --> 2CO2 + 3H2

B: 2C2H6 + 7O2 --> 4CO2 + 6H2O

C: 2C2H6 + 5O2 --> 4CO + 6H2O

D: C2H6 --> 2C + 3H2