The correct answer is: A) Land taxes.
Land taxes were the major source of revenue for medieval kingdoms in Telangana. The rulers of these kingdoms would collect taxes from the farmers who lived on their land. The amount of tax that was collected would vary depending on the fertility of the land and the amount of crops that were produced.
Trade tariffs were also a source of revenue for medieval kingdoms in Telangana. However, they were not as important as land taxes. The rulers of these kingdoms would collect tariffs on goods that were imported and exported through their territories.
Religious taxes were not a major source of revenue for medieval kingdoms in Telangana. The rulers of these kingdoms did not have a strong religious following and did not collect much money in the form of religious taxes.
Mining royalties were also not a major source of revenue for medieval kingdoms in Telangana. There were no major mines in Telangana during the medieval period and the rulers of these kingdoms did not collect much money in the form of mining royalties.
In conclusion, land taxes were the major source of revenue for medieval kingdoms in Telangana. Trade tariffs, religious taxes, and mining royalties were also sources of revenue, but they were not as important as land taxes.