Concept:Plastics are polymers formed from small unsaturated hydrocarbon molecules.
Explanation:Ethene (
C2H4) has a carbon-carbon double bond.
This double bond opens up, allowing many ethene molecules to join together.
This process is called addition polymerization.
It produces polythene, which is widely used in the plastic industry.
Methane, sulphur, and hydrogen cannot undergo this type of polymerization.
Hence, ethene is the key raw material for making plastics among these options.
Answer:A. Ethene