What are the functions of World Meteorological Organization?
1. To facilitate worldwide co-operation in the establishment of networks of stations for the making of meteorological observations as well as hydrological or other geophysical observations
2. To promote standardization of meteorological and related observations and ensure the uniform publication of observations and statistics
3. To promote activities in operational hydrology and to further enhance co-operation between meteorological and the hydrological services
Which of the statements given above is/are correct?

A. 1 only

B. 2 only

C. 3 only

D. All of the above

Answer: Option D