The correct answer is: A. Nylon
Nylon is a strong, lightweight, and durable synthetic fiber made from long-chain polymers of aliphatic amide. It is one of the most common and versatile synthetic fibers, and is used in a wide variety of applications, including clothing, textiles, ropes, and carpets.
Polythene is a type of plastic made from polyethylene, a polymer of ethylene. It is a lightweight, strong, and flexible material that is used in a variety of applications, including packaging, bottles, and pipes.
Polyvinyl chloride (PVC) is a type of plastic made from polyvinyl chloride, a polymer of vinyl chloride. It is a strong, durable, and versatile material that is used in a variety of applications, including pipes, windows, and flooring.
Methyl methacrylate (MMA) is a type of plastic made from methyl methacrylate, a monomer of methyl methacrylate. It is a clear, strong, and durable material that is used in a variety of applications, including acrylic sheets, lenses, and paints.
In conclusion, nylon is the correct answer because it is a strong, lightweight, and durable synthetic fiber that is used in a wide variety of applications.