Observe the following polymers.
$I$. $PHBV$
$II$. Nylon-$2$-nylon-$6$
$III$. Glyptal
$IV$. Bakelite
Which of the above is/are biodegradable polymer$(s)$?

Match the polymers given in Column-$I$ with the type of linkage present in them given in Column-$II$.

Column-$I$	Column-$II$
$A$. Terylene	$i$. Glycosidic linkage
$B$. Nylon	$ii$. Ester linkage
$C$. Cellulose	$iii$. Phosphodiester linkage
$D$. Protein	$iv$. Amide linkage
$E$. $RNA$

Match List-$I$ (polymer) with List-$II$ (monomer/s) and select the correct option:
| List-$I$ (polymer) | List-$II$ (monomer/s) |
| :--- | :--- |
| $(A)$ Bakelite | $(I)$ $2$-Methyl-$1,3$-butadiene |
| $(B)$ Natural rubber | $(II)$ Glycine + Aminocaproic acid |
| $(C)$ Glyptal | $(III)$ Phenol + formaldehyde |
| $(D)$ Nylon $2$-Nylon $6$ | $(IV)$ Phthalic acid + ethylene glycol |

In the trinitrocellulose,each glucose unit contains how many $-OH$ groups?

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:

Which of the following polymers contains nitrogen?