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  5. Rocks and Soil / चट्टानें और मिट्टी

4th Class Science Rocks and Soil / चट्टानें और मिट्टी Question Bank Rocks and Soil

  • question_answer
    The hardest natural substance found on earth is _______.

    A) Soil                             

    B) Slate          

    C) Quartz                        

    D) Diamond

    Correct Answer: D

    Solution :

    Diamond


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