Answer : 4. "Haryana"
Explanation :

India International Science Festival (IISF) 2023 was organized in Haryana from January 17 to 20, 2024. It was concluded in the presence of state Chief Minister Manohar Lal Khattar. On the occasion, the Chief Minister also announced the state government's plans to develop a state-of-the-art science city spread over 50 acres in Faridabad. Several MoUs were signed at IISF 2023.