$\therefore$ IUPAC name: $4$ - chloro-$3$- methylbut -$2$- en -$1$- ol.

$C{H_3}\, - \,\,C{H_2}\, - \,\,C{H_2}\, - \,\,\mathop C\limits_{\mathop {||}\limits_{OHC\,\, - \,\,C\,\, - \,\,C{H_2}\, - \,\,C{H_3}} } \,\, - \,\,COOH$
$\begin{array}{*{20}{c}}
{Me} \\
{|\,\,\,\,} \\
{{H_2}C - N - C - Et} \\
{\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,|\,\,} \\
{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Me\,\,\,\,\,C{H_2}C{H_3}}
\end{array}$



