Which one of the following countries is not a founder member of OPEC?

The Organization of the Petroleum Exporting Countries (OPEC) was established during the Baghdad Conference held from September 10–14, 1960 [t1][t2]. The organization was founded by five original member countries: Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela [t4][t5]. These five nations are recognized as the 'Founder Members' or 'charter members' of the organization [t6][t8]. While Algeria is a prominent member of OPEC today, it did not join the organization at its inception. According to historical records, Algeria joined OPEC in 1969, nearly nine years after the initial formation [t7]. Therefore, among the options provided, Algeria is the only country that was not a founding member. Iraq, Iran, and Kuwait were all part of the original group that signed the founding agreement in Baghdad [t2][t3].

Sources

1. [1] https://treaties.un.org/doc/Publication/UNTS/Volume%20443/volume-443-I-6363-English.pdf
2. [2] https://history.state.gov/historicaldocuments/frus1958-60v04/d314
3. [3] https://www.bbc.com/news/world-middle-east-16577688