Which substance is the hardest substance in the human body?
A. Lungs
B. Brain
C. Ribs
D. Enamel
Answer
Correct Answer: D. Enamel
Detailed About MCQs
Enamel is the thin outer covering of the tooth. Enamel is the hardest tissue in the human body and contains the highest percentage of minerals, 96%, with water and organic material composing the rest.