Which from following polymers is used as surgical suture?

Step-by-step solution

Surgical sutures require materials with high tensile strength, flexibility, and biocompatibility. Among the given polymers, both polyamides (Nylon 6 and Nylon 6,6) are used for non-absorbable sutures. Nylon 6 in particular is widely employed due to its optimal balance of strength and handling characteristics, with common examples including Ethilon and Dermalon sutures. High-density polyethylene and polyacrylonitrile lack the necessary properties for this medical application.