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B
Corundum
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C
Sulphur
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D
Fluorspar
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Solution
The correct option is B Corundum Abrasives are materials that are used to finish or polish a piece through rubbing. The most common natural abrasives used commercially are enamel finishes, plastic and tile. These are used for for polishing and cleaning metal. A non-metallic mineral used in abrasives is corundum. It is a crystalline form of aluminium oxide.