The correct answer is A. Synthetic fibre.
Terylene is a type of polyester, which is a synthetic fiber made from petroleum. It is a strong, durable fiber that is often used in clothing, fabrics, and other products.
B. Natural fibre is a fiber that is derived from plants or animals. Examples of natural fibers include cotton, wool, and silk.
C. Modified natural fibre is a fiber that is made from a natural fiber that has been treated or processed in some way. Examples of modified natural fibers include rayon and acetate.
D. Blend of cotton and silk is a fabric that is made from a blend of cotton and silk fibers.