Dacron (PET) classification: among the following, which description best fits Dacron?

Introduction / Context:
Dacron is a trade name for polyethylene terephthalate (PET) fibres. Classification questions often probe whether you can simultaneously recognize its chemistry and its broader family.

Given Data / Assumptions:

• PET forms by condensation of a diacid (or diester) with a diol.
• “Polyester” denotes the presence of ester linkages.
• We allow multi-select logic via “Both (b) and (c)”.

Concept / Approach:
PET is a condensation polymer (b) and specifically a polyester (c). It is not an addition polymer. Therefore, the most accurate single choice is “Both (b) and (c).”

Step-by-Step Solution:
Link PET synthesis to condensation chemistry.Identify ester linkages → polyester family.Select combined option (d).

Verification / Alternative check:
Process descriptions of PET (DMT or PTA routes) confirm esterification and polycondensation steps.

Why Other Options Are Wrong:
Addition polymer: incorrect for PET.Single options (b) or (c) miss that both descriptors apply.

Common Pitfalls:
Forgetting that “polyester” is a structural family, while “condensation” describes the mechanism.

Final Answer:
Both (b) and (c)