Which one of the following polymers is Prepared by addition polymerisation?

1. Novolac, Dacron, and Nylon-66 are condensation polymers (formed by loss of small molecules like water).2. Teflon (Polytetrafluoroethylene) is formed by the addition polymerisation of tetrafluoroethene (${\text{CF}}_2={\text{CF}}_2$) monomers without any loss of side products.