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

• A

  ${\mathrm{CH}}_2=\mathrm{CH}-\mathrm{CH}={\mathrm{CH}}_2$
• Correct answer
  B

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

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

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

Hence, the correct answer is option: 'B'.