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Q. |
The chemical substance present in bones and teeth is - |
A. | Calcium phosphate |
B. | Calcium chloride |
C. | Calcium sulphate |
D. | Calcium borate |
Answer» A. Calcium phosphate | |
Explanation: Seventy percent of bone consists of hydroxyapatite, a calcium phosphate mineral (known as bone mineral). Tooth enamel is composed of almost ninety percent hydroxylapatite. |
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