The correct answer is Gujarat. PM Modi on 28 May 2022 inaugurated the world's first Nano Urea Liquid plant by IFFCO at Kalol, Gujarat. Indian Farmers Fertiliser Cooperative (IFFCO) has set up additional manufacturing facilities for the production of nano fertilisers at different locations in the country. IFFCO nano urea liquid was developed through proprietary technology at Nano Biotechnology Research Centre in Kalol. Additional Information?Indian Farmers Fertiliser Cooperative Limited, also known as IFFCO, is a multi-state cooperative society. IFFCO is wholly owned by Cooperative Societies of India. The society is engaged in the business of manufacturing and marketing of fertilizers. IFFCO:Headquarters: New DelhiFounded: 3 November 1967,Chairman: Dileep SanghaniMD and CEO: Dr U S Awasthi