Explanation:

World Toilet Day is being celebrated on November 19. This year the theme remarks the importance of "Sustainable sanitation and climate change".

• It is an official United Nations international observance day on 19 November to spread awareness about the global sanitation crisis.
• Objective: To reach, SDG #6 i.e. to reach everyone with sanitation, and halve the proportion of untreated wastewater and increase recycling and safe reuse.
• It was established by the World Toilet Organization in 2001. Twelve years later, the UN General Assembly declared World Toilet Day an official UN day in 2013.
• UN-Water is the official convener of World Toilet Day.
• World Toilet Day is marked by educational campaigns and other activities. Events are planned by UN-Water, local civil society organizations and volunteers.

Hence only statement 2 is correct.