Answer: Option D
:
D
Explanation:
Bakelite and Melamine are examples of thermosetting plastics. They are a type of plastic which when moulded once cannot be softened by heating unlike a thermoplastic.
Note: A thermoplastic, or thermosoftening plastic, is a plastic polymer material that becomes pliable or moldable at a certain elevated temperature and solidifies upon cooling. Polyethylene, polypropylene, polyvinyl chloride (pvc), acrylic, nylon and Teflon are examples of thermoplastics.