Mining activities in Arunachal Pradesh can have potential environmental impacts like:

Deforestation
Water pollution
Soil erosion
All of the above

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

Mining activities can have a number of negative environmental impacts, including deforestation, water pollution, and soil erosion.

Deforestation is the clearing of forests for other uses, such as agriculture or mining. This can lead to a loss of biodiversity, as well as an increase in soil erosion and water pollution.

Water pollution can occur when mining activities contaminate water sources with sediment, chemicals, or heavy metals. This can make the water unsafe for drinking, bathing, or irrigation.

Soil erosion is the process of soil being carried away by wind or water. This can be caused by mining activities, as well as other factors such as deforestation and agriculture. Soil erosion can lead to a loss of topsoil, which is essential for plant growth.

In addition to these environmental impacts, mining activities can also have a number of social and economic impacts. These can include displacement of people, loss of livelihoods, and conflict between mining companies and local communities.

It is important to consider all of the potential impacts of mining activities before they are undertaken. This can help to minimize the negative impacts and maximize the benefits of mining.