The D-8 is an organization of nine _____ countries.

Explanation
D-8  is the economic group of  nine Muslim countries. The  D-8 i s an organization of  nine   Developing  countries: Short trick to learn D-8  BETii - MNP Bangladesh Egypt Indonesia Iran Malaysia Nigeria Pakistan Turkey Azerbaijan India  is  not  a member of  the  D-8  ** The  D-8 Organization  for Economic Cooperation, also  known  as  Developing-8 The  D-8 Organization  for Economic Cooperation  Headquarters :  İstanbul, Türkiye D8  was Established in  Istanbul in 1997. The  Founder  of  D-8 Organization for Economic Cooperation :  Necmettin Erbakan