Which one of the following pairs is correctly matched?

The correct match is Cambodia and the Riel. The Cambodian Riel (KHR) was introduced in 1955 and serves as the official currency of the country, often circulating alongside the US Dollar. Other options are incorrectly paired: the official currency of Myanmar (Burma) is the Kyat (MMK), not the Baht [t1, t2, t9]. The Baht (THB) is the official currency of Thailand, having been in use since the 19th century [t2, t4]. Vietnam's official currency is the Dong (VND), while the Rupiah (IDR) is the currency of Indonesia [t7]. These currency profiles are essential components of the economic geography of Southeast Asian nations, reflecting their individual fiscal histories and regional monetary identities [t10].