The correct answer is Singapore. The Association of Southeast Asian Nations (ASEAN) was formed on 8 August 1967 through the Bangkok Declaration, signed in Thailand's capital by five founding members: Indonesia, Malaysia, the Philippines, Singapore, and Thailand. The declaration's stated aims were to accelerate economic growth, social progress, and cultural development in the region, while also promoting regional peace and stability during a period marked by Cold War tensions and post-colonial nation-building across Southeast Asia. Thailand's role as host and signatory reflects its historical position as a stable, uncolonised nation capable of hosting diplomatic initiatives, and Bangkok's naming in the founding document is why the declaration bears the city's name rather than a more generic title. This question is built to test precise recall of the original five-member founding group, since ASEAN later expanded significantly, and candidates might mistakenly credit one of the later-joining nations as an original founder. Brunei, option A, joined ASEAN in 1984, shortly after gaining full independence from Britain, making it the sixth member rather than a founding one. Vietnam, option B, joined much later in 1995, following the end of the Vietnam War and a subsequent period of economic reform and regional reintegration. Myanmar, option D, joined together with Laos in 1997, over three decades after ASEAN's founding, and its membership has at times been controversial due to domestic political issues. A common exam confusion is conflating ASEAN's original five founders with its full ten-member roster today, since by the time Cambodia joined in 1999, ASEAN had reached its current membership of ten countries. Revision takeaway: the five founding ASEAN members, signed via the 1967 Bangkok Declaration, are Indonesia, Malaysia, the Philippines, Singapore, and Thailand — remembering this quintet prevents confusion with later entrants like Brunei, Vietnam, and Myanmar.
