Which prefixes correspond to the United Kingdom and Ireland in ICAO codes?

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Multiple Choice

Which prefixes correspond to the United Kingdom and Ireland in ICAO codes?

Explanation:
ICAO airport codes start with a country prefix, the first two letters showing the country or region. For the United Kingdom the prefix is EG, and for Ireland it is EI. The rest of the code identifies the specific airport (for example, EGLL = London Heathrow, EIDW = Dublin). The other prefixes listed correspond to different countries (EK is Denmark, EN is Norway), and EIIR isn’t a valid country prefix—Ireland’s standard prefix is EI. That’s why United Kingdom: EG and Ireland: EI is the best match.

ICAO airport codes start with a country prefix, the first two letters showing the country or region. For the United Kingdom the prefix is EG, and for Ireland it is EI. The rest of the code identifies the specific airport (for example, EGLL = London Heathrow, EIDW = Dublin). The other prefixes listed correspond to different countries (EK is Denmark, EN is Norway), and EIIR isn’t a valid country prefix—Ireland’s standard prefix is EI. That’s why United Kingdom: EG and Ireland: EI is the best match.

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