An alkene \(A\) on reaction with \(\mathrm{O}_{3}\) and \(\mathrm{Zn}-\mathrm{H}_{2} \mathrm{O}\) gives propanone and ethanal in equimolar ratio. Addition of \(HCl\) to alkene \(A\) gives \(B\) as the major product. The structure of product \(B\) is:

1. A \(Cl - C{H_2} - C{H_2} - \begin{array}{*{20}{c}}
     {C{H_3}} \\ 
     {|\,\,\,\,\,} \\ 
     {CH} \\ 
     {|\,\,\,\,\,} \\ 
     {C{H_3}} 
   \end{array}\)
2. B \(\begin{array}{*{20}{c}}
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}Cl} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,|} \\ 
     {C{H_3} - C{H_2} - CH - C{H_3}} 
   \end{array}\)
3. C \(C{H_3} - C{H_2} - \begin{array}{*{20}{c}}
     {C{H_3}\,\,\,\,\,\,\,\,} \\ 
     {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {C - C{H_3}} \\ 
     {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {Cl\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
   \end{array}\)
4. D \(\begin{array}{*{20}{c}}
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{H_3}C} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
     {C{H_3} - CH - CH} \\ 
     {\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\;\;|} \\ 
     {\,\,\,\,\,\,\,Cl\,\,\,\;{H_3}C} 
   \end{array}\)