The correct option is A nylon - 6,6
NYLON - 6,6 - It is prepared by condensation polymerization of hexamethylene diamine & adipic acid.
DACRON - It is formed by the interaction of ethylene glycol & terephthalic acid.
RAYON - It is semi-synthetic polymer, as it is manufactured from cellulose which is naturally occurring moreover.
TEFLON - It is formed by addition of n number of tetrafluro ethene.