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Question

Which of the following pairs correctly represents biodegradable and non-biodegradable substances, respectively?

This question was previously asked in
RRB Group D 2025 Question Paper (18-Aug-2026) (Shift 1)
The correct answer is

Paper – Plastic

Biodegradable substances are broken down by microorganisms; non-biodegradable ones are not.

Paper is biodegradable and plastic is non-biodegradable, so 'Paper – Plastic' is in the correct order.

'Metal – Food waste' and 'Plastic – Cotton' are the wrong way round.

Hence, the answer is Paper – Plastic.

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