Step 1 — Understand the question:
The question asks: "Which of the following is not a chief organ of the United Nations Organisation (UNO)?"
To answer this, we need to recall the structure of the United Nations and identify its six principal (chief) organs as mentioned in the UN Charter.
Step 2 — Recall the six chief organs of the UN:
According to the UN Charter, the six principal organs of the United Nations are:
1. General Assembly — The main deliberative body where all member states are represented.
2. Security Council — Responsible for international peace and security.
3. Economic and Social Council (ECOSOC) — Coordinates economic, social, and related work.
4. Trusteeship Council — Established to oversee trust territories (though its operations are now suspended).
5. International Court of Justice (ICJ) — The judicial organ of the UN, located in The Hague.
6. Secretariat — Headed by the Secretary-General, responsible for administrative functions.
Step 3 — Examine the option given:
The International Labour Organisation (ILO) is indeed a United Nations agency, but it is not one of the six chief organs of the UN. Instead, the ILO is a specialized agency of the UN, established in 1919 (before the UN itself), and later became associated with the UN system. Its role is to deal with international labour standards, social protection, and promoting decent work.
Step 4 — Distinguish clearly:
- Chief organs → The six listed above.
- Specialized agencies → Independent organizations like ILO, WHO (World Health Organization), UNESCO, IMF, etc., which work in cooperation with the UN but are not its principal organs.
Step 5 — Final conclusion:
Therefore, the International Labour Organisation (ILO) is not a chief organ of the UN, making it the correct answer.
Answer: The correct option is (A) : International Labour Organisation.