The primary source of revenue for the Jharkhand government is:

Income Tax
Goods and Services Tax (GST)
Mining royalties
Tourism

The correct answer is: c) Mining royalties.

Mining royalties are a type of tax that is paid to the government by mining companies. The amount of royalty that is paid is usually based on the value of the minerals that are extracted. In Jharkhand, mining royalties are the primary source of revenue for the government. This is because the state has a large amount of mineral resources, including coal, iron ore, and bauxite.

Income tax is a type of tax that is paid on the income that individuals and businesses earn. Goods and services tax (GST) is a type of tax that is levied on the sale of goods and services. Tourism is a type of economic activity that involves people traveling to and staying in places other than their usual place of residence for leisure, business, or other purposes.

While income tax, GST, and tourism are all important sources of revenue for the Jharkhand government, mining royalties are the primary source of revenue. This is because the state has a large amount of mineral resources, including coal, iron ore, and bauxite.