Which one of the following is a non-metallic mineral?

AManganese

BMagnesium

CGypsum

DBauxite

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Correct Answer: C: Gypsum

Explanation: The correct answer is C: Gypsum. Gypsum is a non-metallic mineral. It is a soft sulfate mineral (CaSO₄·2H₂O) used in fertilizers, plaster, drywall, and cement. Manganese, Magnesium, and Bauxite are metallic minerals.

Which one of the following is a non-metallic mineral?

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