Compound Z has the molecular formula $\text{C}_4\text{H}_8\text{O}_2$. In the presence of concentrated $\text{H}_2\text{SO}_4$, compound Z reacts with propan-1-ol. The skeletal formulae of three compounds, S, T and U, are shown in the diagram. What skeletal formulae could represent the products formed when compound Z reacts with propan-1-ol?
- AS and T
- BU only
- CS and U
- DT only