A number of non-cyclic alcohols are not oxidised by warm acidified $\text{MnO}_4^-$ ions. Alcohol X is the one in this group with the smallest molecular mass. How many moles of oxygen are needed for the complete combustion of $1.0\,\text{mol}$ of alcohol X?
- A$3.5\,\text{mol}$
- B$4.5\,\text{mol}$
- C$6.0\,\text{mol}$
- D$6.5\,\text{mol}$