The term plastics mean that it is a solid that kind of act like a liquid and moves when saying that the "mantle is plastic". Thus b option is correct.
What is plastic?
Plastic is discovered by German chemist Christian Schonben in the year of 1845.
Plastic is derived from Greek word plastikos which means to mould.
Plastic are made by carbon and hydrogen ( hydrocarbon) which act as a building block of long polymer molecule. These building blocks are known as monomers, they combine together and make a long carbon chains called polymers.
Plastic is made up of important ingredient, an important organic substance of large molecular weight. You can also says that polymers of long carbon chains.
Therefore, the term plastics mean that it is a solid that kind of act like a liquid and moves when saying that the "mantle is plastic". Thus B option is correct.
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