The correct answer is: a) Limestone
Limestone is a sedimentary rock composed mainly of calcium carbonate (CaCO3). It is the most common sedimentary rock on Earth, and the most widely used industrial mineral. Limestone is used in a variety of products, including cement, lime, glass, and steel.
Iron ore is a mineral that contains iron. It is the primary raw material used to make iron and steel. Iron ore is found in a variety of forms, including hematite, magnetite, and taconite.
Manganese is a chemical element with the symbol Mn and atomic number 25. It is a metal that is a member of the transition metals and is the ninth-most abundant element in the Earth’s crust. Manganese is a silvery-white metal that is hard and brittle. It is used in a variety of products, including batteries, steel, and alloys.
Copper is a chemical element with the symbol Cu and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Copper is used in a variety of products, including electrical wiring, plumbing, and coins.
Punjab is a state in northwestern India. It is the second most populous state in India, after Uttar Pradesh. Punjab is a major agricultural state, and is also known for its production of steel and other metals.
Limestone is found in significant quantities in Punjab. It is used in a variety of products, including cement, lime, glass, and steel.