The correct option is D Dacron
The condensation polymers are formed by repeated condensation reaction between two different bifunctional or trifunctional monomeric units. In these polymerisation reactions, the elimination of small molecules such as water, alcohol, hydrogen chloride, etc. take place.
Dacron is condensation polymer of ethylene glycol and terephthalic acid.
Teflon, Polystyrene and PVC are addition polymers.