Explanation:

Only statements 2&3 are correct.

• Central Ground Water Board, under the Ministry of Jal Shakti, is the apex body for managing, exploring, monitoring, assessing, and regulating groundwater resources in India.

• Established in 1970, CGWB was initially formed by renaming the Exploratory Tube Wells Organization and was later merged with the GroundWater Wing of the Geological Survey of India in 1972.

• The Central Ground Water Board is constituted under the Environmental Protection Act, 1986, regulates groundwater development to ensure its sustainability.

• CGWB provides scientific expertise for groundwater management, including exploration, monitoring, and water quality assessments.

• It also implements schemes for artificial recharge and rainwater harvesting to augment groundwater levels.

• CGWB releases State and District hydrogeological reports, ground water year books and Atlases.

Hence option 2nd is correct.