Which of the following represents the given mode of hybridisation $Sp^2-Sp^2-Sp-Sp$ from left to right?

Question

$ (a)\;H_2C = CH - C \equiv N \\ (b)\;H_2 \equiv C -C \equiv CH \\ (c)\;H_2C = C= C =CH_2 \\ (d)\;H_2C =CH_2 $