At `300 K` and `1 atm, 15 mL` of a gaseous hydrocarbon requires `375 mL` air containing `20% O_(2)` by volume for complete combustion. After combustion, the gases occupy `330 mL`. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is
A. `C_(4)H_(10)`
B. `C_(3)H_(6)`
C. `C_(3)H_(8)`
D. `C_(4)H_(8)`