Which of the following has cross-links?

Match materials given in Column-$I$ with the polymers given in Column-$II$.

Column-$I$	Column-$II$
$A$. Natural rubber latex	$i$. Nylon
$B$. Wood laminates	$ii$. Neoprene
$C$. Ropes and fibres	$iii$. Dacron
$D$. Polyester fabric	$iv$. Melamine formaldehyde resins
$E$. Synthetic rubber	$v$. Urea-formaldehyde resins
$F$. Unbreakable crockery	$vi$. cis-polyisoprene

Match the following:

List-$I$	List-$II$
$A$. $(CH_2-C(Cl)=CH-CH_2)_n$	$I$. Cross-linked network
$B$. Nylon-$6,6$	$II$. Elastomer
$C$. $HDP$	$III$. Fibre
$D$. Melamine-formaldehyde	$IV$. Ziegler-Natta catalyst

Match the following:

Polymer	Type
$A$. Bakelite	$P$. Homo polymer
$B$. Nylon-$6$	$Q$. Condensation polymer
$C$. Terylene	$R$. Polyester
$D$. $PHBV$	$S$. Copolymer

Polyethylene is prepared from calcium carbide as follows:
$CaC_2 + 2H_2O \to Ca(OH)_2 + C_2H_2$
$C_2H_2 + H_2 \to C_2H_4$
$nC_2H_4 \to (-CH_2-CH_2-)_n$
Calculate the amount of polyethylene produced from $64 \ kg$ of $CaC_2$. (in $kg$)