Answer : 4. "Washington D.C. "
Explanation :

The headquarters of the International Monetary Fund (IMF) is located in Washington D.C., United States. It is a specialized agency of the United Nations. The IMF was established at the Bretton Woods Conference in 1944. Its objectives are to promote global monetary cooperation, safeguard financial stability, facilitate international trade, promote high employment and sustainable economic growth, and reduce poverty around the world.