The correct answer is: A. polyurethane
Polyurethane is a polymer that is made up of repeating units of urethane groups. It is a versatile material that can be used to make a variety of products, including combs, toys, bowls, and more. Polyurethane is strong, durable, and resistant to wear and tear. It is also non-toxic and safe to use.
Polystyrene is a type of plastic that is made up of long chains of styrene molecules. It is a lightweight material that is often used to make packaging materials, such as cups and plates. Polystyrene is also used to make some toys and other consumer goods. However, polystyrene is not as durable as polyurethane and is not as resistant to wear and tear.
Metallic polysulphides are a type of plastic that is made up of long chains of sulfur atoms. They are strong and durable materials that are often used in industrial applications. However, metallic polysulphides are not as common as other types of plastic and are not typically used to make consumer goods.
Teflon is a type of plastic that is made up of long chains of fluorine and carbon atoms. It is a very slippery material that is often used to make non-stick cookware. Teflon is also used in some industrial applications. However, teflon is not as strong or durable as polyurethane and is not typically used to make consumer goods that are subject to wear and tear.