The correct answer is: a) Gold.
Gold has been identified in the Papum Pare district of Arunachal Pradesh. In 2016, the Geological Survey of India (GSI) discovered gold deposits in the district. The GSI estimated that the gold deposits in the district could be worth up to Rs. 10,000 crore.
The gold deposits are located in the foothills of the Himalayas. The gold is found in quartz veins. The gold deposits are estimated to be 100 million tonnes.
The gold deposits in the Papum Pare district are the first major gold deposits to be discovered in Arunachal Pradesh. The discovery of the gold deposits has the potential to boost the economy of the state.
The other options are incorrect.
Option b) Uranium is a radioactive element. Uranium is used in nuclear power plants. Uranium is not found in the Papum Pare district.
Option c) Copper is a metal. Copper is used in electrical wiring. Copper is not found in the Papum Pare district.
Option d) Bauxite is an ore of aluminum. Bauxite is used to make aluminum. Bauxite is not found in the Papum Pare district.