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# Which of the following has low tensile strength than natural rubber?

$\begin{array}{1 1}(a)\;\text{Neoprene rubber}\\(b)\; \text{Buna-N}\\(c)\;\text{Buna-S}\\(d)\;\text{Melamine}\end{array}$

Neoprene is superior to natural rubber in its stability to aerial oxidation and its resistance to vegetable and mineral oils,gasoline and other solvents.Buna-N is also resistant to the action of petrol,lubricating oil and organic solvents.Buna-S has slightly less tensile strength than natural rubber.
Hence (c) is the correct answer.