The correct answer is option 2 - Hyderabad. The National Institute of Nutrition is located in Hyderabad, India. This institute is a premier research institute under the Indian Council of Medical Research (ICMR) that focuses on carrying out research in nutritional sciences. It was established in the year 1918 and has since been actively involved in research, training, and development of guidelines and policies related to nutrition. The institute conducts several research studies in the field of nutrition and aims to provide evidence-based recommendations to address nutritional challenges and improve the health and well-being of the population. Additionally, the institute also offers postgraduate courses and training programs in nutrition and dietetics.