Which of the following molecules represents the order of hybridisation ${\mathrm{sp}}^2,{\mathrm{sp}}^2,\mathrm{sp},\mathrm{sp}$ from left to right atoms?

• A

  $\mathrm{HC}\equiv \mathrm{C}-\mathrm{C}\equiv \mathrm{CH}$

• B

  ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{C}\equiv \mathrm{CH}$

• C

  ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$

• D

  ${\mathrm{CH}}_3-\mathrm{CH}=\mathrm{CH}-{\mathrm{CH}}_3$