In the process of economic integration among different countries, which one of the following is the correct order?
1
Common market - Free trade area - Customs union - Economic union
2
Free trade area - Customs union - Common market - Economic union
3
Free trade area - Common market - Customs union - Economic union
4
उभयनिष्ठ बाजार - मुक्त व्यापार क्षेत्र - आर्थिक संघ - सीमाशुल्क संघ