$\begin{array}{1 1}(1) \text{Reduction of an acyl halide with } H_2/Pd \\\text{(2) Reduction of an ester with}Na/C_2H_5OH \\
\text{(3) Reduction of a carbonyl compound with} Na/Hg\; and\; HCl. \\\text{(4) Reduction of an anhydride with}LiAlH_4.\end{array} $
