Glycol is an important component of which of the following?

The following structure represents a subunit of a hydrocarbon polymer that may be prepared by a radical polymerization method. Identify the monomer that has been polymerized to make this polymer chain.

The correct statement regarding $X$ and $Y$ in the following set of reactions is:
$nCH_2=CH_2 \xrightarrow[(C_2H_5)_3Al, TiCl_4]{333-343 \ K, 6-7 \ atm} Y$
$nCH_2=CH_2 \xrightarrow[(C_6H_5COO)_2]{350-570 \ K, 1000-2000 \ atm} X$

The monomeric units of Bakelite are:

Which of the following monomers is used to prepare thermocol?

Match the polymers given in column $-I$ with the preferred mode of polymerisation followed by their monomers in column $-II$.

Column $-I$	Column $-II$
$A$. Nylon $-6, 6$	$i$. Free radical polymerisation
$B$. $PVC$	$ii$. Ziegler-Natta polymerization or coordination polymerization
$C$. $HDP$	$iii$. Anionic polymerisation
	$iv$. Condensation polymerization