Out of the options provided for polymers used to obtain plastic dinnerware, the correct answer is: Option C: Melamine-formaldehyde Melamine-formaldehyde resin is a type of plastic known for its durability and heat resistance, making it particularly suitable for use in the manufacturing of dinnerware such as plates, bowls, and utensils. This kind of plastic does not easily get scratched and is also resistant to stains, which adds to its suitability for dinnerware that undergoes frequent use and washing. Here's a brief overview of the options to understand why the others are not used for plastic dinnerware: Option A: Bakelite - Bakelite is a phenol-formaldehyde resin, which is known for being one of the first synthetic plastics. It is heat resistant and has been used for a variety of applications including electrical insulators and radio and telephone casings. However, it is not typically used for dinnerware. Option B: Teflon - Teflon is the brand name for a polymer known as polytetrafluoroethylene (PTFE). It is best known for its non-stick properties, which is why it is often used to coat cookware. Teflon itself isn't used to make dinnerware items like plates and cups. Option D: Polyacrylonitrile - Polyacrylonitrile is a synthetic, semicrystalline organic polymer resin, used primarily to make fibers. It is not commonly used in the production of dinnerware. As such, melamine-formaldehyde resin is the correct choice for a polymer used in the manufacture of plastic dinnerware.