Which of the following is a biodegradable polymer of the polyamide class?

Match the polymers given in column-$I$ with their chemical names given in column-$II$.

Column-$I$	Column-$II$
$A$. Nylon-$6$	$i$. Polycaprolactum
$B$. $PVC$	$ii$. Polyvinyl chloride
$C$. Acrilan	$iii$. Polyacrylonitrile
$D$. Natural rubber	$iv$. cis-polyisoprene
$E$. $LDP$	$v$. Low density polythene

The polydispersity index $(PDI)$ of a polymer is ($\bar{M}_w = \text{weight average molecular mass}$ and $\bar{M}_n = \text{number average molecular mass}$)

Match $List-I$ with $List-II$.

$List-I$ (Polymer)	$List-II$ (Monomer)
$(A)$ Neoprene	$(I)$ Acrylonitrile
$(B)$ Teflon	$(II)$ Chloroprene
$(C)$ Acrilan	$(III)$ Tetrafluoroethene
$(D)$ Natural rubber	$(IV)$ Isoprene

Choose the correct answer from the options given below.

Which polymer is commonly used in nonstick cookwares?

The turbidity of a polymer solution is a measure of ........