Match the polymers given in Column I with the preferred mode of polymerisation followed by their monomers.
| Column I | Column II |
| (i) Nylon -6,6 | (a) Free radical polymerisation |
| (ii) PVC | (b) Ziegler-Natta polymerisation or Co-ordination polymerisation |
| (iii) HDP | (c) Anionic Polymerisation |
| (d) Condensation polymerisation |