Which of the following is not a specialised agency of United Nations Organization?

The "Food and Agriculture Organization", the "International Monetary Fund" and the "World Health Organization" are specialised agencies brought into relationship with the United Nations under Articles 57 and 63 of the UN Charter. The "World Trade Organization", established by the Marrakesh Agreement in 1995, is an independent international organisation outside the UN system and has no such relationship agreement, so it is not a UN specialised agency.