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Q: Which of the following is a Rock?
  • A. Quartz.
  • B. Mica.
  • C. Gypsum.
  • D. None of the above
Correct Answer: Option C - Gypsum is a lime rock with a thin coating.
C. Gypsum is a lime rock with a thin coating.

Explanations:

Gypsum is a lime rock with a thin coating.