Answer : 2. "World Science Day for Peace and Development"
Explanation :

International Science and Peace Week is celebrated annually from 9 to 15 November. It was first celebrated in 1986 to commemorate the International Year of Peace. This week was proclaimed by the United Nations General Assembly in 1988. World Science Day for Peace and Development is observed on 10 November 2023. The theme of this year's festival is “Building Trust in Science”.