Identify the biodegradable polymer from the following.

Intermolecular forces in nylon-$6,6$ are

The intermolecular forces present in $Nylon-6,6$ are........

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

Nylon $66$ is

If $\bar{M}_w$ is the weight average molecular weight and $\bar{M}_n$ is the number average molecular weight of a polymer,the poly dispersity index $(PDI)$ of the polymer is given by