Q. Which among the given is the hardest substance in the human body -
✅ Correct Answer: (A)
Enamel
Explanation:
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.
Explanation by: Official MCQ Buddy
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.