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# $F_2C=CF_2$ is a monomer of

$\begin {array} {1 1} (a)\;Teflon & \quad (b)\;Glyptal \\ (c)\;Nylon-6 & \quad (d)\;Buna-5 \end {array}$

(Teflon 1910-1994) of DuPont in 1938 and introduced as a commercial product in 1946. It is a fluoropolymer but is the brand name of the polymer polytetrafluoroethylene (PTFE) discovered by Roy J. Plunkett not a thermoplastic in the true sense.
Ans : (a)