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B
Butadiene and Styrene
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C
Tetrafluoroethene
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D
Acrylonitrile
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Solution
The correct option is D Acrylonitrile Polyacrylonitrile (PAN), is formed by addition polymerisation of acrylonitrile in presence of a peroxide catalyst. A member of the important family of acrylic resins, it is a hard, rigid thermoplastic material that is resistant to most solvents and chemical, slow to burn, and of low permeability of gases. Thus the correct answer is option (d).