Which of the following monomer is used for preparation of Nylon-6?

Which of the following monomer is used for preparation of Nylon-6?
  1. Isobutylene
  2. Hexamethylene diammonium adipate
  3. Caprolactum
  4. Acrylonitrile

Asked in: MHT CET 2021 (20 Sep Shift 1)

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