Respuesta :

  The   compound  that  would  be   most   reactive  is   Ethyne  (answer A)


     explanation

  •    Ethyne   is the  most    unsaturated  among the four  compounds  ( it  has a triple bond between  the two carbon atoms) .

  • The  triple  bond in ethyne   is made up  of 1  sigma  bond  and  2π   bond.
  • The 2π  bond  are  weaker   and can  easily break   which  make  Ethyne  more  reactive than  Ethene, methane  and Ethane.