Which of the following polymers is used to obtain bristles for brushes?

Name the accelerator used to introduce a network of crosslinks in elastomers.

Identify the polymer used to obtain disposable cups and plates.

Given below are two statements,one is Assertion $(A)$ and the other is Reason $(R).$
Assertion $(A):$ Natural rubber is a linear polymer of isoprene called cis-polyisoprene with elastic properties.
Reason $(R):$ The cis-polyisoprene molecules consist of various chains held together by strong polar interactions with a coiled structure.
In the light of the above statements,choose the correct one from the options given below:

Which of the following polymers is used to obtain oil seals?

The monomer of Teflon is :-