Arrange the following Secretaries-General in chronological order of their service:

1- Kofi Annan
2- Trygve Lie
3- U Thant
4- Ban Ki-moon

Choose the correct answer from the given options:

2, 3, 1, 4

The correct answer is Option 1: 2, 3, 1, 4

2- Trygve Lie
3- U Thant
1- Kofi Annan
4- Ban Ki-moon

UN Secretary Generals in chronological order:

1. Trygve Lie (1946-1952), Norway.
2. Dag Hammarskjöld (1953-1961), Sweden.
3. U Thant (1961-1971), Burma (Myanmar).
4. Kurt Waldheim (1972-1981), Austria.
5. Javier Perez de Cuellar (1982-1991), Peru.
6. Boutros Boutros-Ghali (1992-1996), Egypt.
7. Kofi A. Annan (1997-2006), Ghana.
8. Ban Ki-moon (2007-2016), Republic of Korea (South Korea).
9. António Manuel de Oliveira Guterres (2017-), Portugal.