What are $\underline {X}$ and $\underline {Y}$ in the following reaction sequence :$C_2H_5OH \longrightarrow \underline{X} \longrightarrow \underline{Y}$

Question

\[\begin {array} {1 1} (1)\;C_2H_5CL, CH_3CHO & \quad (2)\;CH_3CHO,CH_3CO_2H \\ (3)\;CH_3CH_O,CCl_3CHO & \quad (4)\;C_2H_5CL,CCl_3CHO \end {array}\]