Sulphur is not present in

coal
gypsum
iron pyrites
chlorapatite

The correct answer is D. chlorapatite.

Coal, gypsum, and iron pyrites all contain sulfur. Sulfur is a non-metallic chemical element with the symbol S and atomic number 16. It is abundant in the Earth’s crust, and is a major component of many minerals. Sulfur is also found in

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fossil fuels, such as coal and oil.

Chlorapatite is a mineral that is composed of calcium, fluorine, chlorine, and phosphorus. It does not contain sulfur.

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