In the compoundC H2=C H−C H2−C H2−C ≡C H the  C2−C3 bond  is  of

The correct numbering of parent chain isC1H2=C2H−C3H2−C4H2−C5≡C6HDouble and triple bond are equidistant from terminals, numbering is done in alphabetical order, giving lower number to ‘ene.’Hence, C2−C3  are  sp2−sp3  hybridised.