Answer : 4. "November 19"
Explanation :

World Toilet Day (WTD) is an official United Nations international observance day on 19 November to inspire action to tackle the global sanitation crisis. Worldwide, 4.2 billion people live without "safely managed sanitation" and around 673 million people practice open defecation. 74  Sustainable Development Goal 6 aims to "Ensure availability and sustainable management of water and sanitation for all" In particular, target 6.2 is to "End open defecation and provide access to sanitation and hygiene". When the Sustainable Development Goals Report 2020 was published.