A) calcium phosphate
B) calcium carbonate
C) sodium chloride
D) potassium hydroxide
Correct Answer: A
Solution :
Bone is also made up of a matrix (a bonding of multiple fibres and chemicals) of different materials, including primarily collagen fibres and crystalline salts. The crystalline salts deposited in the matrix of bone are composed principally of calcium and phosphate, which are combined to form hydroxyapatite crystals.
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