Teflon (i) is a polymer used primarily for non-stick coatings and not as a fiber.
Starch (ii) is a polysaccharide used primarily in food, not as a fiber.
Terylene (iii) is a polyester polymer, also known as PET (Polyethylene Terephthalate), which is widely used in the manufacture of fibers for textiles and clothing.
Orlon (iv) is a type of acrylic fiber, a synthetic polymer used for making fibers in fabrics.
Thus, Terylene and Orlon are used as fibers, making option (C) the correct answer.