The correct option is C Both 'A' and 'B'
World Meteorological Day is celebrated every year on 23 March to commemorate the entry into force in 1950 of the convention that created the World Meteorological Organization. It is UN specialized agency for meteorology, operational hydrology and related geophysical sciences. It is dedicated to international cooperation and coordination on state and behaviour of Earth’s atmosphere, its interaction with land and oceans, the weather and climate and distribution of water resources.