Arrange the following Regional Trade Blocks in descending order on their basis of number of member nations.

(A) ASEAN (Association of South East Asian Nations)
(B) EU (European Union)
(C) NAFTA (North American Free Trade Association)
(D) SAFTA (South Asian Free Trade Agreement)

Choose the correct answer from the options given below :

(B), (A), (D), (C)

NAFTA: 3 Members

SAFTA: 8 Members

ASEAN: 10 Members

EU: 13 Members