Correct Answer: Limestone

Solution : The correct option is limestone.

The cement industry makes extensive use of limestone. It is a key component in the manufacture of cement. The process includes heating limestone and other minerals at high temperatures to produce "clinker," which is then crushed into a fine powder to form cement. This cement serves as a binder in concrete and other building materials. While the other minerals listed (clay, gypsum, and coal) are also needed in cement manufacturing, limestone is a particularly important component since it provides the calcium oxide required for the chemical reactions that occur during the cement-making process.