When a certain amount of ethylene was combusted, 6226 kJ heat was evolved. If heat of combustion of ethylene is 1411 kJ, the volume of `O_(2)` (at STP) that entered into the reaction is :
A. 296.5 litres
B. 300.3 litres
C. `6226xx22.7` litres
D. 22.7 litres