The correct answer is (c) Land Revenue.
Land revenue was the principal source of state income in Mughal India. It was collected in the form of a share of the produce, usually one-third or one-fourth. The amount of revenue was determined by the quality of the land and the type of crop grown.
Booty was another source of state income, but it was not as important as land revenue. Booty was obtained from wars and raids. It was usually in the form of gold, silver, jewels, and other valuables.
Escheat was the right of the state to take possession of the property of a person who died without heirs. This was not a major source of state income in Mughal India.
Taxes were also collected by the Mughal government, but they were not as important as land revenue. Taxes were levied on a variety of items, including trade, agriculture, and professions.
In conclusion, land revenue was the principal source of state income in Mughal India. It was collected in the form of a share of the produce, usually one-third or one-fourth. The amount of revenue was determined by the quality of the land and the type of crop grown.