The correct answer is: a) Own tax revenue.
Own tax revenue is the revenue that a state government generates from taxes that it levies on its own citizens and businesses. This includes taxes on income, property, sales, and other sources.
Revenues generated from royalties on natural resources like hydropower and mining are a type of own tax revenue. This is because the state government has the authority to levy these taxes and collect the revenue from them.
The other options are incorrect.
b) Non-tax revenue is revenue that a state government generates from sources other than taxes. This includes fees, charges, and other sources.
c) Share of central taxes is a portion of the taxes that the central government collects that is shared with the state governments.
d) Foreign investment is investment that is made in a country by foreign companies or individuals.
I hope this helps! Let me know if you have any other questions.