Multiple choice Which of the following sets represents only third generation petrochemicals? Polythene, PVC, Nylon 11 DDT, Natural rubber, Nylon 66 Polythene, PVC, DDT Cellulose, Nylon 66, Polythene Reveal answer Fill a bubble to check yourself C Correct answer Explanation Polythene, PVC and DDT are third generation petrochemicals derived from ethylene, vinyl chloride and chlorobenzene, respectively.