Read the passage and answer the question:

The First World War encouraged the world to invest in an international organisation to deal with conflict. Many believed that such an organisation would help the world avoid war. As a result, the League of Nations was born. However, despite its initial success, it could not prevent the Second World War (1939-45). Many more people died and were wounded in this war than ever before. The UN was founded as a successor to the League of Nations.

Which of the following country was not a part of the Tehran Conference?

France

The correct answer is Option 2 - France

1943 December: Tehran Conference Declaration of the Three Powers (US, Britain and the Soviet Union).

The Tehran Conference included:
United States, United Kingdom and Soviet Union.
These three countries were represented by their leaders: Franklin D. Roosevelt, Winston Churchill, and Joseph Stalin, respectively.