In which year was the European Union awarded the Nobel Peace Prize?

2012

The correct answer is option (4) - 2012

In 2012 the EU or the European Union was awarded the Nobel Peace Prize.

The Treaty of Maastricht, formally known as the Treaty on European Union, was signed in 1992 and laid the foundations for the European Union (EU). It established the EU as a political and economic union, creating the framework for a common foreign and security policy, as well as a single currency, the Euro.