Buna-S is obtained from

• A

  Styrene and 2-chloro-1,3-butadiene
• B

  Adipic acid and hexamethylene diamine
• Correct answer
  C

  Styrene and butadiene
• D

  Glycine and $\varepsilon$-amino caproic acid

Solution

Buna $\mathbf{S}$ is copolymer of 1,3 butadiene and styrene. It is obtained by the polymerisation of butadiene and styrene in the ratio of 3: 1 in the presence of sodium.

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