The correct answer is option 3, Pune. The National Water Academy is a center of excellence that focuses on training and capacity building in water resource management. It is located in Pune, which is a city in the state of Maharashtra, India. Pune is known for its academic institutions, research centers, and educational infrastructure. It has a favorable climate and is surrounded by hills, rivers, and lakes, making it a suitable location for a center that specializes in water resource training. The National Water Academy plays a crucial role in enhancing the knowledge and skills of professionals working in the field of water resource management. It conducts various training programs, workshops, and research activities to strengthen the understanding and management of water resources in India.