Correct Answer:
Option C - World Desertification and Drought Prevention Day is observed on 17th June every year. In 1994, the United Nations General Assembly declared it to be celebrated on June 17. World Environment Day is observed every year on June 5, Earth Day on April 22, and International Day for Biodiversity on May 22nd.
C. World Desertification and Drought Prevention Day is observed on 17th June every year. In 1994, the United Nations General Assembly declared it to be celebrated on June 17. World Environment Day is observed every year on June 5, Earth Day on April 22, and International Day for Biodiversity on May 22nd.