The white enamel of our teeth is composed of:

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(A) The white enamel of our teeth is primarily composed of hydroxyapatite,which is a crystalline form of calcium phosphate,$Ca_3(PO_4)_2$. However,in

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$Ca_3(PO_4)_2$

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(A) The white enamel of our teeth is primarily composed of hydroxyapatite,which is a crystalline form of calcium phosphate,$Ca_3(PO_4)_2$. However,in the context of dental health and the role of fluoride,the enamel surface can be converted into the harder and more acid-resistant fluorapatite,$CaF_2$,when fluoride ions are present. Given the standard options provided in many textbooks,$Ca_3(PO_4)_2$ is the primary constituent of the enamel.

List-$I$ (Substances)	List-$II$ (Composition)
$A$. Plaster of Paris	$i$. $CaSO_4 \cdot \frac{1}{2} H_2O$
$B$. Epsomite	$ii$. $MgSO_4 \cdot 7H_2O$
$C$. Kieserite	$iii$. $MgSO_4 \cdot H_2O$
$D$. Gypsum	$iv$. $CaSO_4 \cdot 2H_2O$
	$v$. $CaSO_4$

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