Which of the following can absorb over $90 \%$ of its own mass of water and also does not stick to wounds?

Consider the Assertion and Reason given below.
Assertion $(A):$ Ethene polymerized in the presence of Ziegler-Natta catalyst at high temperature and pressure is used to make buckets and dustbins.
Reason $(R):$ High density polymers are closely packed and are chemically inert.
Choose the correct answer from the following:

Which of the following polymers contains nitrogen?

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

List-$I$ (Monomer Unit)	List-$II$ (Polymer)
$(a)$ Caprolactum	$(i)$ Natural rubber
$(b)$ $2-$Chloro$-1,3-$butadiene	$(ii)$ Buna$-N$
$(c)$ Isoprene	$(iii)$ Nylon$-6$
$(d)$ Acrylonitrile	$(iv)$ Neoprene

Choose the correct answer from the options given below:

Phenol and formaldehyde undergo condensation to give a polymer $(A)$ which on heating with formaldehyde gives a thermosetting polymer $(B)$. Name the polymers. Write the reactions involved in the formation of $(A)$. What is the structural difference between the two polymers?

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