The correct answer is: d) All of the above.
Arunachal Pradesh is a state in northeastern India. It is the largest state in India by area, but has the lowest population density. The state is rich in natural resources, including coal, limestone, graphite, and other minerals.
Coal is a fossil fuel that is formed from the remains of plants and animals that lived millions of years ago. It is a major source of energy in India, and Arunachal Pradesh has significant deposits of coal. The coal in Arunachal Pradesh is of high quality, and it is used to generate electricity and produce steel.
Limestone is a sedimentary rock that is formed from the remains of marine organisms. It is used in a variety of industries, including construction, cement production, and papermaking. Arunachal Pradesh has significant deposits of limestone, and it is one of the major producers of limestone in India.
Graphite is a mineral that is used in a variety of applications, including pencils, lubricants, and electrodes. Arunachal Pradesh has significant deposits of graphite, and it is one of the major producers of graphite in India.
In addition to coal, limestone, and graphite, Arunachal Pradesh also has significant deposits of other minerals, including iron ore, bauxite, and copper. The state is a major mining hub, and it contributes significantly to the Indian economy.