Which of the following groups includes ALL biodegradable substances?

Correct option is B

Sol: The correct answer is (b) Grass wood, orange peels

Key points:

Biodegradable substances are those that can be broken down into natural elements by microorganisms like bacteria and fungi. These substances decompose naturally and do not harm the environment.

• Grass: Biodegradable.
• Wood: Biodegradable (although it takes longer to decompose).
• Orange peels: Biodegradable (decomposes quickly).

​Analysis of Other Options:

A. Flower, wood, batteries:

• Flowers and wood are biodegradable.
• Batteries are non-biodegradable (contain heavy metals and chemicals).

C. Grass, plastic, flower:

• Grass and flowers are biodegradable.
• Plastic is non-biodegradable.

D. Vegetable peel, wood, rubber:

• Vegetable peel and wood are biodegradable.
• Rubber (especially synthetic rubber) is non-biodegradable.