The correct option is B Rayon
Rayon is a semi-synthetic fibre which is made by the chemical processing of cellulose. It is a good absorbent of water, which makes it weak, eventually causing the fibre to break easily. This makes them less durable compared to other synthetic fibres like nylon, polyester, acrylic, etc.
Nylon, polyester, acrylic, etc are synthetic fibres made from petrochemicals. They are water resistant and more durable as compared to rayon.