The correct option is D Many plants use coal as the source of power.
India has a significant domestic market for cement consumption. Some of the cement industries in Gujarat have the advantage of being close to export markets in Gulf regions.
There are also opportunities for export to various countries in East Asia, Middle East, Africa and South Asia. To operate the machinery in the cement industry, it is important to ensure regular electric power supply. In many plants, coal - a heavy mineral is also used as the source of power.