(A) Calcium carbonate (X)
(B) Calcium phosphate ()
(C) Calcium sulphate (X)
(D) Calcium nitrate (X)
Answers: Calcium phosphate
(A) Calcium carbonate (X)
(B) Calcium phosphate ()
(C) Calcium sulphate (X)
(D) Calcium nitrate (X)
Answers: Calcium phosphate
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