Which of the following polymers can have vinylic monomer units?

The correct option is D

Polystyrene

Option (A)

Acrilan or Orlon is made from monomer Acrylonitrile

• Its monomer Acrylonitrile is vinylic since it has, cyanide functional group to C=C bond.

Option (B)

Polystyrene is obtained by polymerization of styrene monomer.

• Structure of styrene monomer:

• Hence, it is also a vinylic monomer.

Option (C)

• Nylon polymer like Nylon 6,6 and Nylon 6 are polyamide polymers and none of them have any vinylic monomer

Option (D)

• Teflon is made from monomer Tetrafluoroethene, whole structure is $C{F}_2=C{F}_2$
• It also has fluoride functional group attached to $C$=C bond, therefore it is also a vinylic

Therefore, the correct options are (A), (B) and (D).