Which statements are not correct about European Union?

The correct answer is Option (1) → The EU was awarded the Nobel Peace Prize in 2010.

Option (1) The EU was awarded the Nobel Peace Prize in 2010. False. The EU was awarded the Nobel Peace Prize in 2012.

Option (2) Bulgaria and Romania joined the EU in 2007. True. They joined in January 2007.

Option (3) The Treaty of Maastricht was signed in 1992 to establish the European Union (EU). True. It was signed on 7 February 1992.

Option (4) Croatia became the 28th member of the EU. True. Croatia became the 28th member in 2013.