What are the chemical signals of calcium phosphate ?

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Chemical signal of calcium phosphate Ca3 (PO4) 2
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Main component of bone ash is (A) Calcium sulphate (B) Calcium phosphate (C) Calcium carbonate (D) Sodium phosphate

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Last Answer : what is the answer ?

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Reaction of Cresylic acid with __________ produces Tricresyl phosphate.(A) Phosphorous pentoxide (B) Phosphorous oxychloride (C) Ammonium phosphate (D) Calcium phosphate

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