The correct answer is: A. Cement
Charkhi-Dadri and Surajpur are two districts in the Indian state of Uttar Pradesh. The main industry in these districts is cement manufacturing. There are several large cement factories located in these districts, which produce a significant amount of cement for the Indian market.
The cement industry is an important part of the economy of Charkhi-Dadri and Surajpur. It provides employment to a large number of people and contributes to the state’s GDP. The cement industry is also a major source of tax revenue for the government.
The cement industry in Charkhi-Dadri and Surajpur is facing some challenges, such as the rising cost of raw materials and the competition from other countries. However, the industry is expected to continue to grow in the future.
The other options are incorrect because they are not the main industry in Charkhi-Dadri and Surajpur. Paper and sugar are not major industries in these districts, and there are no large paper or sugar factories located there.