Terylene is also known as:

The correct answer is Option (3) → Dacron

Terylene, also called Dacron, is a polyester made by condensation of ethane-1,2-diol and terephthalic acid (benzene-1,4-dicarboxylic acid).

    \( \displaystyle n\,\ce{HOCH2CH2OH} + n\,\ce{HOOC-C6H4-COOH} \to \ce{-(OCH2CH2OOC-C6H4-CO)_{n}-} + 2n\,\ce{H2O} \)

Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.

NCERT (Pre-rationalised edition, 2022-23):
Polyesters – …