Write the method of preparation for alcohol by the reduction of carboxylic acid.

(N/A) Carboxylic acids are reduced to primary alcohols by lithium aluminium hydride $(LiAlH_{4})$ or more selectively with diborane $(B_{2}H_{6})$.
$RCOOH \xrightarrow[\text{(ii) } H_{3}O^{+}]{\text{(i) } LiAlH_{4} \text{ or } B_{2}H_{6}} RCH_{2}OH$
$(b)$ $(i)$ Diborane does not easily reduce functional groups such as esters,nitro,or halo groups.
$(ii)$ Sodium borohydride $(NaBH_{4})$ does not reduce the carboxyl group.
$(c)$ In this reaction,the reduction of $-COOH$ to $-CH_{2}OH$ is a partial reduction,whereas reduction by ($HI$ + Red $P$) is a complete reduction which yields an alkane.