Q. Bones are mainly made up of

  • (A) calcium and iron
  • (B) calcium and phosphorus
  • (C) calcium and magnesium
  • (D) calcium and sulphur
✅ Correct Answer: (B) calcium and phosphorus

Published by Ram Sharma ⭐ 193.88K Points at 01-May-2022 07:38 pm in Biology

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