Step 1: Test for condensation:
Look for two functional groups per monomer and loss of a small molecule when the chain grows.
Step 2: Apply:
Ethylene glycol has two -OH groups and terephthalic acid has two -COOH groups. They form ester links and release water, giving Dacron, a polyester.
Step 3: Others:
Ethene, acrylonitrile and tetrafluoroethene each have a single C=C and add on to each other without by-products, so they are addition polymers.
Final Answer:
Dacron, option (D).
\[ \boxed{\text{Dacron (D)}} \]