Which of the following is/are non – biodegradable?
A.Tyre
B.Plastic
C.Electronic components
D.All of the above

The correct answer is D. All of the above.

Non-biodegradable materials are substances that cannot be broken down into simpler, harmless compounds by natural biological processes (like the action of bacteria or fungi).¹

• Tyres are made of vulcanized rubber, a synthetic polymer that is highly resistant to decomposition.
• Plastic is another synthetic polymer designed for durability, which microbes cannot break down.
• Electronic components consist of metals, glass, and plastics that do not decompose naturally and can release toxic substances.

All these items persist in the environment for hundreds or thousands of years, contributing to pollution.