Which of the following European country is not member of European Union?

Which of the following European country is not member of European Union?

مندرجہ ذیل میں سے کون سا یورپی ملک یورپی یونین کا رکن نہیں ہے؟
Explanation

It is a regional trade organization and free trade area consisting of Iceland, Liechtenstein, Norway and Switzerland.

None of these countries are part of the European Union, but aside of Switzerland, others are all part of the European Economic Area