Which one of the following has been constituted under the Environment (Protection) Act, 1986?

1. The question asks which body was constituted under the Environment (Protection) Act, 1986. 2. The Central Ground Water Authority (CGWA) was constituted under Section 3(3) of the Environment (Protection) Act, 1986, through a notification in 1997. Its mandate is to regulate and control the development and management of ground water resources in the country. 3. The Central Water Commission (CWC) is an attached office of the Ministry of Jal Shakti, primarily dealing with surface water resources. Its origins predate the 1986 Act. 4. The Central Ground Water Board (CGWB) is a subordinate office under the Ministry of Jal Shakti, focused on scientific surveys, exploration, monitoring, and management of ground water resources. It also predates the 1986 Act in its earlier forms. 5. The National Water Development Agency (NWDA) was established in 1982 as an autonomous society under the Ministry of Irrigation (now Jal Shakti) to study inter-basin water transfers. 6. Therefore, the Central Ground Water Authority is the body constituted under the Environment (Protection) Act, 1986.