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Q. Which among the given is the hardest substance in the human body -

  • (A) Enamel
  • (B) Bone
  • (C) Nail
  • (D) Dentine
  • Correct Answer - Option(A)
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  • Filed under category Biology
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Explanation by: Admin

Enamel is the hardest substance in the human body. It covers the outer layer of the teeth and is highly mineralized, consisting mainly of hydroxyapatite (calcium phosphate).

  • Bone (B) and Dentine (D) are also hard but not as strong as enamel.
  • Nail (C) is made of keratin, which is much softer compared to enamel.

Thus, tooth enamel is the hardest substance in the human body.

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