In benzyne [
] intermediate, the triple bond consists of :
A. one sp-sp sigme bond and two p-p pi-bonds
B. one `sp^(2)-sp^(2)` sigma bond and two p-p pi-bonds
C. two sp-sp sigma bonds and one p-p pi-bond
D. one `sp^(2)-sp^(2)` sigma bond, one `sp^(2)-sp^(2)` pi-bond and one p-p pi-bond
