c
\(\begin{array}{*{20}{c}}
{\,\,\,C{H_2}OH} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{C{H}OH} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{\,\,C{H_2}OH}
\end{array}\,\xrightarrow[{ - 2{H_2}O}]{{KHS{O_4},\,225{}^ \circ C}}\begin{array}{*{20}{c}}
{C{H_2}\,\,\,} \\
{||\,\,\,\,\,\,\,\,} \\
{C\,\,\,\,\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,\,\,} \\
{\,\,\,\,CHOH}
\end{array}\,\, \to \,\begin{array}{*{20}{c}}
{C{H_2}\,\,\,} \\
{||\,\,\,\,\,\,\,\,} \\
{CH\,\,\,\,\,} \\
{||\,\,\,\,\,\,\,\,} \\
{\,CHO}
\end{array}\)
(અસ્થાયી)એક્રલિન