Concept:The National Water Academy (NWA) is a premier training institute for water resource engineers in India.Explanation:The NWA is situated at Khadakwasla, Maharashtra.It functions under the Central Water Commission, which is an attached office of the Ministry of Jal Shakti.The academy was established with assistance from USAID and later strengthened with support from the World Bank.Its primary role is to train in-service engineers from Central and State organizations involved in water resources development and management.It serves as a key institution for capacity building in the water sector.Answer:D. Khadakwasla