Q.

Which of the following is primarily composed of calcium carbonate?

A. Fish scales
B. Shark teeth
C. Oyster Shes
D. Whale bones
Answer» C. 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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Biology (GK)

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