The correct answer is: d) All of the above.
Arunachal Pradesh is a state in north-eastern India. It is the largest state in the country 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 that lived millions of years ago. It is used to generate electricity and to produce steel. Limestone is a sedimentary rock that is composed of calcium carbonate. It is used in the construction industry and in the manufacture of cement. Graphite is a mineral that is composed of carbon. It is used in the manufacture of pencils and in the production of lubricants.
Arunachal Pradesh has significant deposits of all of these minerals. The state’s coal reserves are estimated to be 10 billion tonnes. Its limestone reserves are estimated to be 100 billion tonnes. Its graphite reserves are estimated to be 10 million tonnes.
The development of these mineral resources has the potential to bring significant economic benefits to Arunachal Pradesh. However, there are also concerns about the environmental impact of mining. The state government is working to develop these resources in a sustainable way.