Step 1: Understanding Terylene.
Terylene is the trade name for polyethylene terephthalate (PET), which is a synthetic fibre widely used in textiles and packaging materials.
Step 2: Chemical classification.
Polyethylene terephthalate is formed by condensation polymerization of ethylene glycol and terephthalic acid. The repeating ester linkage (–COO–) classifies it as a polyester.
Step 3: Analysis of options.
(A) Polyester: Correct — Terylene belongs to the polyester family.
(B) Polyamide: Includes nylons, not Terylene.
(C) Vinyl polymer: Derived from vinyl monomers, not applicable here.
(D) Acrylic Polymer: Based on acrylonitrile, not Terylene.
Step 4: Conclusion.
Terylene is a polyester, therefore option (A) is the correct answer.