The correct answer is: a) Limestone.
Limestone is a sedimentary rock composed mostly of calcium carbonate (CaCO3). It is the most common sedimentary rock on Earth, and the most widely used industrial mineral. Limestone is used in the manufacture of cement, lime, and other building materials. It is also used in the production of steel, paper, and other products.
Gypsum is a mineral composed of calcium sulfate dihydrate (CaSO4·2H2O). It is a soft, white mineral that is used in the manufacture of plaster, drywall, and other building materials. Gypsum is also used in the production of fertilizer, paper, and other products.
Dolomite is a mineral composed of calcium magnesium carbonate (CaMg(CO3)2). It is a white, gray, or brown mineral that is used in the manufacture of cement, lime, and other building materials. Dolomite is also used in the production of steel, paper, and other products.
Mica is a group of minerals that are composed of sheet silicates. Mica is a transparent or translucent mineral that is used in the manufacture of electrical insulation, roofing materials, and other products.
Limestone is the most common mineral used in the cement industry. It is used to make cement, which is a binding agent that is used in the construction of buildings and other structures. Limestone is also used to make lime, which is a white powder that is used in the manufacture of paper, soap, and other products.