(i) National Ganga River Basin Authority (NGRBA) is a financing, planning, implementing, monitoring and coordinating authority for the Ganges River, functioning under the water resource ministry of India. The mission of the organisation is to spearhead the river conservation efforts at the national level. (ii) In 2014, UPSC asked similar question, where one of the statement was- "PM is chairman of NGRBA". That statement was right as per India Yearbook 2014 . Therefore, here statement 3 is wrong, CM can't by the chairman of NGRBA. By elimination, we reach answer (a).