The charter of the United Nations was drawn up in ________

Analyze the question: It asks where the UN Charter was drawn up (written and agreed upon), not where the UN is headquartered.

Explain the concept: The United Nations replaced the failed League of Nations after World War II. Delegates from 50 countries met at the United Nations Conference on International Organization, held in San Francisco, USA, from April to June 1945.

Step-by-step solution:

1. Earlier steps: The Dumbarton Oaks Conference (Washington DC, 1944) produced the first proposals, and the Yalta Conference (1945) settled voting procedures in the Security Council.
2. The final Charter was drafted, debated, and signed on 26 June 1945 in San Francisco.
3. It came into force on 24 October 1945, which is now celebrated as United Nations Day.
4. New York is the location of the UN headquarters, but the Charter was not drawn up there. This is the common trap in the question.
5. Washington DC hosted only the preliminary talks, and Los Angeles had no role.

Answer: The Charter was drawn up in San Francisco, which is option B.

Exam tip: Remember "San Francisco = Signed", and "New York = Now headquarters". JAMB often tests the difference between where the UN was created and where it is based.