Which among following compounds is used as monomer in preparation of Teflon?

Which among following compounds is used as monomer in preparation of Teflon?
  1. Tetrabromoethylene
  2. Tetrafuoroethylene
  3. Tetrachloroethylene
  4. Tetraiodoethylene

Asked in: MHT CET 2021 (23 Sep Shift 2)

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