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# Which of the following statements are correct?

$\begin{array}{1 1}(a)\;\text{Dacron is a fibre}\\(b)\; \text{Polystyrene isnt a thermoplastic}\\(c)\;\text{Alkyl resins are addition}\\(d)\;\text{Natural rubber behaves as thermosetting polymer}\end{array}$

Polystrene is a thermoplastic.Alkyl resins are condensation polymers and natural rubber behaves as thermoplastics.
Dacron is a polyester fibre.
Hence (a) is the correct answer.