The major product of the following reaction is \(\begin{array}{*{20}{c}}
  {C{H_3}C{H_2}CH - C{H_2}} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Br\,\,\,\,\,\,\,\,\,Br\,\,} 
\end{array}\xrightarrow[\begin{subarray}{l} 
  (ii)\,NaN{H_2} \\ 
  in\,liq.\,N{H_3} 
\end{subarray} ]{{(i)\,KOH\,alc.}}\)

1. A \(CH_3CH = C = CH_2\)
2. B \(\begin{array}{*{20}{c}}
     {C{H_3}C{H_2}CH - C{H_2}} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|} \\ 
     {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,N{H_2}\,\,\,\,\,\,\,\,\,N{H_2}\,\,} 
   \end{array}\)
3. C \(CH_3CH=CHCH_2NH_2\)
4. D \(C{H_3}C{H_2}C \equiv CH\)