What is the official currency of Portugal?

The correct answer is the Euro, which Portugal adopted as its official currency in 1999 for accounting purposes and introduced as physical notes and coins in 2002, when it joined the first group of European Union countries to switch to the common currency. Before the Euro, Portugal used the Portuguese Escudo, its national currency for over a century, which was withdrawn from circulation once the transition was complete; the CIA World Factbook confirms the Euro as Portugal's current legal tender. The British Pound, option A, is incorrect because the United Kingdom deliberately opted out of Eurozone membership and retained its own currency, making the Pound a frequent distractor in questions about European currencies generally, but it has no connection to Portugal. The Moroccan Dirham, option C, belongs to Morocco, a North African country separated from Portugal by the Strait of Gibraltar and the Iberian Peninsula; candidates sometimes select it purely because Morocco lies geographically close to southern Portugal across the sea, but proximity does not imply shared currency. The Brazilian Real, option D, is the most tempting wrong option because Brazil is a former Portuguese colony and the two countries share a language and deep historical ties; however, Brazil's currency has always been independent of Portugal's, and the Real itself was introduced only in 1994, unrelated to the old Escudo. A common exam confusion is assuming that colonial or linguistic links translate into a shared currency, which is rarely true. The key revision point: Portugal equals Euro today, Escudo historically, and Brazil's Real is a separate, modern, unconnected currency.