The correct answer is (c) 16th September.
World Ozone Day is celebrated on September 16 every year. It is a day to raise awareness about the importance of the ozone layer and the dangers of ozone depletion. The ozone layer is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet radiation. Ozone depletion is caused by human activities, such as the release of chlorofluorocarbons (CFCs) into the atmosphere. CFCs are chemicals that were once widely used in refrigerators, air conditioners, and aerosol cans. However, they were found to be damaging to the ozone layer, and their production was banned in 1987.
World Ozone Day was first celebrated in 1994, on the 15th anniversary of the signing of the Montreal Protocol on Substances that Deplete the Ozone Layer. The Montreal Protocol is an international treaty that was signed by 197 countries in 1987. The treaty has been very successful in reducing the levels of CFCs in the atmosphere, and the ozone layer is slowly recovering. However, ozone depletion is still a serious problem, and it is important to continue to raise awareness about the issue.
The other options are incorrect because they are not the dates of World Ozone Day.