Which of the following polymers contains an amide linkage?

Match List-$I$ with List-$II$ :

List-$I$ (Polymer)	List-$II$ (Used for items)
$A$. $Nylon\,6,6$	$I$. $Bristles\,of\,brushes$
$B$. $Low\,density\,polythene$	$II$. $Toys$
$C$. $High\,density\,polythene$	$III$. $Buckets$
$D$. $Teflon$	$IV$. $Non-stick\,utensils$

Choose the correct answer from the options given below.

$A$ natural linear polymer of $2-$methyl$-1,3-$butadiene becomes hard on treatment with sulphur between $373 \ K$ to $415 \ K$ and $-S-S-$ bonds are formed between chains. Write the structure of the product of this treatment.

Wash and wear clothes are manufactured using

Which of the following statements is correct about Bakelite?

Intermolecular forces in nylon-$6,6$ are