Arrange the UN Secretary-General as per their tenures in the chronological order: 
A. Boutros Boutros- Ghali 
B. Ban-Ki-Moon 
C. U Thant 
D. Kofi A. Annan 
E. Kurt Waldheim 
Choose the correct answer from the options given below:

Correct option is C

The correct chronological order is:
1. U Thant C (1961–1971): He was the third Secretary-General of the United Nations, serving after Dag Hammarskjöld. He was the first non-European to hold this position.
2. Kurt Waldheim E (1972–1981): He served as the fourth Secretary-General of the United Nations.
3. Boutros Boutros-Ghali A (1992–1996): He was the sixth Secretary-General and the first Arab to hold the position.
4. Kofi A. Annan D (1997–2006): He was the seventh Secretary-General and a Nobel Peace Prize laureate.
5. Ban-Ki-Moon B (2007–2016): He was the eighth Secretary-General and hails from South Korea.
Information Booster:
1. U Thant: A Burmese diplomat who led the UN during a crucial period, including the Cuban Missile Crisis.
2. Kurt Waldheim: An Austrian diplomat who served as Secretary-General during the Cold War and was later President of Austria.
3. Boutros Boutros-Ghali: An Egyptian diplomat known for his leadership during post-Cold War conflicts, particularly in Rwanda and Yugoslavia.
4. Kofi A. Annan: A Ghanaian diplomat and Nobel Peace Prize winner, remembered for his work in UN reform and peacekeeping.
5. Ban-Ki-Moon: A South Korean diplomat who focused on climate change and sustainable development during his tenure.