Chloroethane may be prepared from bromoethane in two steps. $\text{C}_2\text{H}_5\text{Br}$ $\xrightarrow{\text{step X}}$ $\text{C}_2\text{H}_5\text{OH}$ $\xrightarrow{\text{step Y}}$ $\text{C}_2\text{H}_5\text{Cl}$ Which of the following statements about these steps are correct?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only