When one mole of an organic compound, $Q$, undergoes complete combustion in oxygen, exactly three moles of water are formed. Which compound is $Q$?
- Abutane, $\text{C}_4\text{H}_{10}$
- Bethanol, $\text{C}_2\text{H}_5\text{OH}$
- Cpropane, $\text{C}_3\text{H}_8$
- Dpropanol, $\text{C}_3\text{H}_7\text{OH}$