Multiple choice general knowledge

Which is the hardest substance in the human body

  1. Enamel

  2. Toe

  3. Palm

  4. Theigh
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Enamel (option A) is the hardest substance in the human body. It is the outermost layer of teeth and has a mineral composition of approximately 96% hydroxyapatite, making it harder than bone. The other options (toe, palm, thigh) refer to body parts, not specific substances, and are much softer than enamel.

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