Which of the following is primarily composed of calcium carbonate? (1) Fish scales (2) Shark teeth (3) Oyster Shes (4) Whale bones

Which of the following is primarily composed of calcium carbonate? (1) Fish scales (2) Shark teeth (3) Oyster Shes (4) Whale bones
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(3) Oyster Shes Explanation: There is a high content of calcium carbonate in mussel andoyster shells, which can be used in the formulation of medicine, in construction or as filler in polymer materials.
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