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# Which of the following polymer can be moulded into any desired shapes when heated?

$\begin{array}{1 1}(a)\;\text{teflon}&(b)\; \text{bakelite}\\(c)\;\text{silk}&(d)\;\text{melamine}\end{array}$

Teflon is a thermoplastic polymer which when heated they melt and form a fluid which can be moulded into any desired shapes and then cooled to get the desired product,which is not possible with silk,bakelite & melamine.
Hence (a) is the correct answer.