Buna- N , a synthetic rubber is copolymer of

• A

  $\begin{aligned} & \mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2 \text { and } \\ & \qquad \mathrm{H}_5 \mathrm{C}_6-\mathrm{CH}=\mathrm{CH}_2\end{aligned}$
• Correct answer
  B

  $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CN}$ and $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}=\mathrm{CH}_2$
• C

  
  
• D

  
  

Solution

Buna- N is a copolymer of butadiene and acrylonitrile.

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