The major product (\(Y\)) in the following reactions is \(\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - CH - C = CH} 
\end{array}\xrightarrow[{{H_2}O}]{{HgS{O_4},{H_2}S{O_4}}}X\) \(\xrightarrow[{(ii)\,conc.{H_2}S{O_4}/\Delta }]{{(i)\,{C_2}{H_5}MgBr,{H_2}O}}Y\)

1. A \(\begin{array}{*{20}{c}}
     {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {C{H_3} - C - CH - C{H_3}} \\ 
     {\,\,\,\,\,|} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,{C_2}{H_5}} 
   \end{array}\)
2. B \(\begin{array}{*{20}{c}}
     {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {C{H_3} - CH - C = CH - C{H_3}} \\ 
     | \\ 
     {\,\,\,\,\,\,C{H_3}} 
   \end{array}\)
3. C \(\begin{array}{*{20}{c}}
     {C{H_3}\,\,\,\,\,\,\,\,} \\ 
     {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {C{H_3} - C = C - C{H_3}} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}C{H_3}} 
   \end{array}\)
4. D \(\begin{array}{*{20}{c}}
     {C{H_3}\,\,\,\,\,\,\,\,} \\ 
     {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
     {C{H_3} - CH - C = C{H_2}} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,C{H_2}C{H_3}} 
   \end{array}\)