Which of the following is the hardest natural substance on Earth? MCQ with Answer and Explanation

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Which of the following is the hardest natural substance on Earth?

A. Diamond

B. Platinum

C. Gold

D. Iron

Answer: Option A

Solution (By JKExamLibrary)

Diamond is an allotrope of carbon and is the hardest known natural mineral.

This question belongs to: Static General Knowledge Science and Technology

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