Tooth enamel of humans is made up of:
- A. Calcium phosphate ✓
- B. Sodium hydrogen carbonate
- C. Sodium hydroxide
- D. Lactic acid
Correct Answer: A. Calcium phosphate
Explanation
Tooth enamel is the hardest substance in the human body and is primarily composed of hydroxyapatite, a crystalline structure of calcium phosphate.
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