Q. Which of the following is/are non-biodegradable?

1. Glass
2. Cotton
3. Paper

Select the correct answer using the codes given below:
Answer: Only 1
Notes: Glass is non-biodegradable as it does not decompose by natural biological processes. Cotton and paper are organic materials that decompose naturally due to microbial activity, making them biodegradable. Glass remains unchanged in the environment for centuries unless physically broken, but it is not broken down by microorganisms.