Structures of some common polymers are given. Which one is not correctly presented?

  • A
    Neoprene - $[ - CH_2 - C(Cl) = CH - CH_2 - CH_2 - ]_n$
  • B
    Terylene - $[ - OC - C_6H_4 - COOCH_2 - CH_2 - O - ]_n$
  • C
    Nylon $6,6$ - $[ - NH(CH_2)_6NHCO(CH_2)_4CO - ]_n$
  • D
    Teflon - $[ - CF_2 - CF_2 - ]_n$

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