Arrange the following regional trade blocks in a descending order on the basis of number of member nations.

A. OPEC (Organisation of Petroleum Exporting Countries)
B. SAFTA(South Asian Free Trade Agreement)
C. NAFTA(North American Integration Association)
D. EU(European Union)

D, A, B, C

The correct answer is Option (3) → D, A, B, C

Following regional blocs contain the following number of member nations:-

D. EU - Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Netherlands and United Kingdom (29)

A. OPEC - Algeria, Indonesia, Iran, Iraq, Kuwait, Libya, Nigeria, Qatar, Saudi Arabia, U.A.E. and Venezuela (12)

B. SAFTA - Bangladesh, Maldives, Bhutan, Nepal, India, Pakistan and Sri Lanka (7)

C. NAFTA - U.S.A., Canada and Mexico (3)