15th December is celebrated as

International Tea Day
World Mathematics Day
World Coffee Day
World Animal Day

The correct answer is: A. International Tea Day

International Tea Day is celebrated on December 15 every year. It was established by the International Tea Committee in 2005 to raise awareness about the importance of tea in the world. Tea is the second most popular drink in the world after water, and it is grown in over 70 countries. It is a major source of income for millions of people around the world.

World Mathematics Day is celebrated on March 14 every year. It was established by the United Nations Educational, Scientific and Cultural Organization (UNESCO) in 2019 to celebrate the beauty and importance of mathematics. Mathematics is a fundamental science that is essential for many fields, including science, technology, engineering, and medicine.

World Coffee Day is celebrated on October 1 every year. It was established by the International Coffee Organization (ICO) in 2015 to raise awareness about the importance of coffee in the world. Coffee is the second most traded commodity in the world after oil, and it is grown in over 70 countries. It is a major source of income for millions of people around the world.

World Animal Day is celebrated on October 4 every year. It was established by Heinrich Zimmermann in 1929 to raise awareness about the importance of animal welfare. Animals play an important role in our lives, and we have a responsibility to protect them.