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Question

Calcium and ............. gives rigidity to bones and teeth.

A
Oxalate
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B
Pectate
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C
Carbonate
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D
Phosphate
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E
Sulphate
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Solution

The correct option is D Phosphate
Phosphorus is found within the skeleton and teeth, where it is compounded with calcium to form calcium phosphate. It is a primarily component of hydroxyapatite crystals in bones and teeth, and help in rigidity to the softer portions.
So the correct answer is D.

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