Research and development can play a role in:

The correct answer is: d) All of the above.

Research and development (R&D) can play a role in finding new uses for Sikkim’s minerals, developing eco-friendly mining technologies, and improving mineral processing efficiency.

• Finding new uses for Sikkim’s minerals can help to increase the value of the minerals and reduce the environmental impact of mining. For example, R&D could be used to develop new ways to use minerals in construction, manufacturing, or energy production.
• Developing eco-friendly mining technologies can help to reduce the environmental impact of mining, such as air and water pollution. For example, R&D could be used to develop new mining methods that use less water or produce less dust.
• Improving mineral processing efficiency can help to reduce the cost of mining and increase the amount of minerals that can be recovered from ore. For example, R&D could be used to develop new methods of mineral processing that are more efficient and less energy-intensive.

Overall, R&D can play a significant role in the sustainable development of Sikkim’s mineral resources.