An organic compound is analysed during the monitoring of a chemical reaction. The mass spectrum of this compound is shown below:

Relative atomic masses (ArA_{\text{r}}Ar): C=12.0\text{C} = 12.0C=12.0, H=1.0\text{H} = 1.0H=1.0, O=16.0\text{O} = 16.0O=16.0
Which molecular formula corresponds to this compound?
C4H10O\text{C}_4\text{H}_{10}\text{O}C4H10O
C3H6O2\text{C}_3\text{H}_6\text{O}_2C3H6O2
C4H8O\text{C}_4\text{H}_8\text{O}C4H8O
C3H8O\text{C}_3\text{H}_8\text{O}C3H8O