Polyesters and polyamides are types of synthetic polymer. Which statements are correct? 1. They are made by addition polymerisation. 2. They are made by condensation polymerisation. 3. The monomers from which they are made are unsaturated hydrocarbons. 4. The monomers from which they are made contain reactive functional groups at their ends. A. 1 and 3 B.1 and 4 0.2 and 3 D.2 and 4