The schematic illustrations of macromolecules given below represent:

• A
  $A$: $HDPE$, $B$: $LDPE$, $C$: Bakelite
• B
  $A$: Bakelite, $B$: $HDPE$, $C$: $LDPE$
• C
  $A$: $HDPE$, $B$: Bakelite, $C$: $LDPE$
• D
  $A$: $LDPE$, $B$: Bakelite, $C$: $HDPE$