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