History · Modern History - Land Revenue Systems

With reference to the Mahalwari system of land revenue administration in colonial India, consider the following statements: I. The system was introduced mainly in the north-western regions of India, particularly in areas of the Ganga-Yamuna Doab and parts of the North-Western Provinces. II. Under this arrangement, revenue demand was fixed for an entire village or estate, and the responsibility for payment rested collectively with village proprietors or headmen. III. The revenue assessment under this system was subject to periodic revision by the colonial administration. Which of the statements given above are correct?