To make $PVC$ a flexible plastic,............. is added during polymerization.

Nylon$-66$ is not a

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A:$ Dacron is an example of polyester polymer.
Reason $R:$ Dacron is made up of ethylene glycol and terephthalic acid monomers.
In the light of the above statements,choose the most appropriate answer from the options given below.

Write down the name of a well-known polymer of the polyester category and explain its preparation and uses.

The molecular weight of cellulose varies between

Match the following.

List-$I$ (Polymer/Type)	List-$II$ (Monomer/Example)
$A$. Addition polymer	$I$. Bakelite
$B$. Condensation polymer	$II$. $2$-methyl-$1,3$-butadiene
$C$. Acrilan	$III$. $2,3$-dimethyl-$1,3$-butadiene
$D$. Rubber	$IV$. Vinyl cyanide
	$V$. Polythene

The correct answer is: