Explanation
C: Nitre (potassium nitrate) is a mineral that is used in the manufacturing of both fertilizers and explosives. It is a major component of gunpowder, and it is also used as a fertilizer because of its high nitrogen content. Gypsum is used in the manufacture of plaster and wallboard, silver is primarily used in jewelry and coins, and tungsten is used in the manufacture of steel alloys and electronic devices.
