The structure of a synthetic polymer is illustrated below. From the structure, it can be seen that it is a ......1...... . It is produced by ......2...... polymerisation. Which words fill gaps 1 and 2?
- A1 polyamide, 2 addition
- B1 polyamide, 2 condensation
- C1 polyester, 2 addition
- D1 polyester, 2 condensation