HomeEveryday Science MCQsWhich is the hardest substance in the human body? 799. Which is the hardest substance in the human body?By Admin / September 17, 2025 A. Tooth enamel B. Skull C. Knee cap D. Rib ✅ The correct answer is option A.
1. Which of the following does not pollute the air? Leave a Comment / Everyday Science MCQs / By Admin
2. Which of the following planets have the longest day? Leave a Comment / Everyday Science MCQs / By Admin