C3H8 + 5O2 -> 3CO2 + 4H2O
According to this equation, which ratio of oxygen to propane is correct?

1- 5 grams O2 / 1 gram C3H8
2- 5 moles O2 / 1 mole C3H8
3- 10 grams O2 / 11 grams C3H8
4- 10 moles O2 / 11 moles C3H8