An organic compound \(A\), \(C_5H_8O\); reacts with \(H_2O\), \(NH_3\) and \(CH_3COOH\) as described below \(A\) is

1. A \(\begin{array}{*{20}{c}}
     {C{H_3}CH = C - CHO} \\ 
     {\,\,\,\,\,\,|} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}} 
   \end{array}\)
2. B \(\begin{array}{*{20}{c}}
     {C{H_2} = CHCH - CHO} \\ 
     {\,\,\,\,\,\,|\,\,\,} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,} 
   \end{array}\)
3. C \(\begin{array}{*{20}{c}}
     {C{H_3} - C{H_2} - C = C = O} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_3}\,\,\,\,} 
   \end{array}\)
4. D \(\begin{array}{*{20}{c}}
     {C{H_3} - C{H_2} - C - C = O} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||\,\,\,\,\,\,\,\,\,|} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}\,H\,\,\,\,} 
   \end{array}\)