Thermoplastic polymers are linear or slightly branched long-chain molecules capable of repeatedly softening on heating and hardening on cooling. Which among the following is/are thermoplastic polymers?
1. Bakelite
2. Polythene
3. Polyvinyl chloride
Select the correct answer using the code given below.
1
1 only
2
1 and 3 only
3
2 and 3 only
4
1, 2, and 3