Match List I (Organisation) with List II (Headquarters) and select the correct answer using the codes given below the lists: List I (Organisation) (Headquarters) A. International Atomic Energy Agency 1. Brussels B. International Telecommunication Union 2. Geneva C. Council of the European Union 3. Paris D. Organisation for Economic Cooperation and Development 4. Vienna Codes:

The correct answer is D because it correctly matches each organisation with its respective headquarters based on international law and diplomatic records.

A. International Atomic Energy Agency is headquartered in Vienna, Austria. This agency was established in 1957 to promote the peaceful use of nuclear energy.

B. International Telecommunication Union is headquartered in Geneva, Switzerland. It is the oldest specialized agency of the United Nations, focused on information and communication technologies.

C. Council of the European Union is headquartered in Brussels, Belgium. It is one of the main legislative bodies of the EU where national ministers from each EU country meet to adopt laws and coordinate policies.

D. Organisation for Economic Cooperation and Development is headquartered in Paris, France. It was founded in 1961 to stimulate economic progress and world trade.

Therefore, the matching sequence corresponds to the numbers 4, 2, 1, and 3.