Buna-$S$ can be represented as:

  • A
    $[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-]_n$
    Option A
  • B
    $[-CH_2-CH=CH-CH_2-CH_2-CH(C_6H_5)-]_n$
    Option B
  • C
    $[-CH_2-CH(C_6H_5)-CH_2-CH_2-CH=CH-]_n$
    Option C
  • D
    $[-CH_2-CH=CH-CH_2-CH(C_6H_5)-CH_2-CH_2-]_n$
    Option D

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