Six international bodies make up the Bretton Woods institutions and the World Bank Group
In July 1944, delegates from 44 countries met at Bretton Woods, New Hampshire, to plan the postwar economy. They agreed two institutions: one to oversee exchange rates and lend to countries with balance of payments problems, and one to finance reconstruction and development. Both came into existence in December 1945. Over the next four decades the lending bank gained four sister bodies: one for private-sector firms, one for the poorest countries, one for investor disputes and one for investment insurance. Together the bank and these four make up the World Bank Group. This list counts the two institutions agreed in 1944 plus the four later bodies, six in all, and accepts the everyday name 'World Bank' for the bank agreed in 1944. A planned third institution, for trade, is not counted.
Name them all first. Then try the harder part: name the two agreed in 1944, then the four added later.