Match List-I with List-II and select the correct answer using the code given below the Lists: List-I List-I (Regional block) (Headquarters) A. ASEAN 1. Brussels B. CIS 2. Vienna C. EU 3. Minsk D. OPEC 4. Jakarta

The correct matching of regional blocs with their headquarters is as follows: ASEAN is headquartered in Jakarta, Indonesia, where its permanent secretariat has been located since 1981 [2]. The Commonwealth of Independent States (CIS) has its administrative seat in Minsk, Belarus [3]. The European Union (EU) is de facto headquartered in Brussels, Belgium, which hosts major institutions like the European Commission and the Council of the European Union. The Organization of the Petroleum Exporting Countries (OPEC) is headquartered in Vienna, Austria, having moved there from Geneva in 1965. Therefore, the correct sequence is A-4, B-3, C-1, and D-2, which corresponds to option 1. These locations serve as the administrative and diplomatic hubs for their respective intergovernmental organizations, facilitating regional cooperation and policy implementation.

Sources

1. [1] https://en.wikipedia.org/wiki/ASEAN_Headquarters
2. [2] https://www.mfaic.gov.kh/Page/2021-04-01-ASEAN-Secretariat-
3. [3] https://www.britannica.com/topic/Commonwealth-of-Independent-States