# The given compound is a polymer named

$\begin{array}{1 1}(a)\;\text{Dacron}\\(b)\; \text{Orlon}\\(c)\;\text{Nylon-6,6}\\(d)\;\text{PVC}\end{array}$

Terylene/Dacron is a polymer of ethylene glycol and terephphalic acid.
Hence (a) is the correct answer.