Refer to the description given below and identify the fibres X and Y.
X: Used to make bristles of toothbrushes.
Y: Used to make water bottles.
X: Nylon, Y: Polyester
X: Nylon, Y: Rayon
X: Polyester, Y: Nylon
X: Rayon, Y: Nylon
X: Suitable for making mufflers and stockings
Y: Used to make trekking ropes and seat belts
Z: Used for making surgical dressing and tyre cords
why nylon is used for making carpets, toothbrush bristles and tyres?