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 five founding members (often referred to as the 'charter' or 'original' members) are Iran, Iraq, Kuwait, Saudi Arabia, and Venezuela [t1][t8][t9]. These five nations signed the initial agreement to coordinate petroleum policies and safeguard their interests against dominant Western oil companies [t2][t4]. Algeria is not a founder member; it joined the organization later in 1969 [t2][t8]. Other subsequent members include Qatar (1961), Libya (1962), and the United Arab Emirates (1967) [t8]. While Algeria remains a significant member of the current 12-member bloc, it was not part of the original group that created the organization in Baghdad [c1][t8].

Sources

1. [1] https://treaties.un.org/doc/Publication/UNTS/Volume%20443/volume-443-I-6363-English.pdf
2. [2] https://www.cfr.org/backgrounder/opec-changing-world
3. [3] Indian Economy, Nitin Singhania .(ed 2nd 2021-22) > Chapter 18: International Economic Institutions > Organization of Petroleum Exporting Countries (OPEC) > p. 548