Identify the monomers used to prepare $Bakelite$ from the following.

Match the following columns:

Polymer	Monomer
$i$. Buna-$S$	$P$. Styrene
$ii$. Terylene	$Q$. Ethylene glycol
$iii$. Elastomer (Neoprene)	$R$. Chloroprene

Correct set of answer:

$C_6H_6O$ (phenol) $\xrightarrow[\text{3}H_2\text{ (High temp and pressure)}]{Ni} (A)$ $\xrightarrow{Cu} (B)$ $\xrightarrow{NH_2OH} (C)$ $\xrightarrow{H^{+}} (D)$ $\xrightarrow{HO^{-}} (E)$
Product $(E)$ is

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

The monomer units of nylon-$6, 6$ and nylon-$2$-nylon-$6$ are respectively:

Select the biodegradable polymer.