(C) Bone ash is the white residue obtained after burning bones. It primarily consists of calcium phosphate,which is represented by the formula $Ca_3(P

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(C) Bone ash is the white residue obtained after burning bones. It primarily consists of calcium phosphate,which is represented by the formula $Ca_3(PO_4)_2$. While raw bone contains hydroxyapatite,$Ca_3(OH)(PO_4)_3$,the calcination process converts it into the stable form $Ca_3(PO_4)_2$.