Where is headquarters of European Union located?

The correct option is Brussels.

The European Union (EU) is a unique economic and political union between 27 European countries. Its de facto capital is Brussels, Belgium, which hosts the headquarters of several principal EU institutions.

Here is a step-by-step breakdown of why Brussels is the primary location:
1. European Commission: The executive branch of the EU, which proposes legislation and implements decisions, is headquartered in the Berlaymont building in Brussels.
2. Council of the European Union: This institution, where national ministers from each EU country meet to adopt laws and coordinate policies, is based in the Justus Lipsius and Europa buildings in Brussels.
3. European Parliament: While its official seat is in Strasbourg, France, the Parliament conducts committee meetings and holds committee sessions in Brussels, where its political groups also meet regularly.

Consequently, because the core decision-making bodies of the union are centered there, Brussels is globally recognized as the headquarters of the European Union.