Terylene classification: which description fits Terylene (polyethylene terephthalate, PET)?

Introduction / Context:
Terylene is the trade name for polyethylene terephthalate (PET), widely used as fibres and bottles. Proper classification helps differentiate polyester chemistry from polyamides and addition polymers.

Given Data / Assumptions:

• PET forms by condensation of ethylene glycol and terephthalic acid (or DMT).
• It is not a polyamide (those arise from diacids + diamines).
• It is not a homopolymer since two different monomers are used.
• It is not an addition polymer; it is a condensation polyester.

Concept / Approach:
Classify by mechanism and monomer set: PET = condensation polyester from two monomers; therefore options (a), (b), (c) are incorrect; “None of these” is appropriate.

Final Answer:
None of these