c
\(\begin{array}{*{20}{c}}
  {\,\,\,C{H_2}OH} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {CHOH} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,C{H_2}OH} 
\end{array}\,\xrightarrow[{}]{{{H_2}S{O_4}}}\begin{array}{*{20}{c}}
  {C{H_2}\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,CHO\,\,\,\,\,\,\,\,} 
\end{array} + \,2{H_2}O\)

                          પ્રોપ \(-2-\) એનાલ (એક્રોલીન)