Which of the following are the key features of 'National Ganga River Basin Authority (NGRBA)'? (i) River basin is the unit of planning and management. (ii) It spearheads the river conservation efforts at the national level. (iii) One of the Chief Ministers of the States through which the Ganga flows becomes the Chairman of NGRBA on rotation basis. Select the correct answer using the code given below :

- Statement (i) is correct. A core principle behind the formation of the National Ganga River Basin Authority (NGRBA) was to adopt a holistic approach to river management by considering the entire river basin as the unit for planning and management, rather than just stretches of the river. - Statement (ii) is correct. The NGRBA, constituted under the Environment (Protection) Act, 1986, was the apex body at the national level responsible for the conservation, pollution abatement, and rejuvenation of the Ganga river. It spear-headed the river conservation efforts. - Statement (iii) is incorrect. The Chairman of the National Ganga River Basin Authority was the Prime Minister of India. The Chief Ministers of the states through which the Ganga flows were members of the Authority, but the chairmanship was not rotational among them.