The UK consists of a) Scotland, Wales; b) England, Wales, Ireland; c) England, Scotland, Wales, Northern Ireland

There are 3 different concepts, which get mixed up: the United Kingdom, Great Britain and England.

The UK stands for the United Kingdom of Great Britain and Northern Ireland (the UK = Great Britain + Northern Ireland)

Great Britain = England+Wales+Scotland

На русском: The UK = Великобритания + Северная Ирландия

Великобритания = Англия + Уэльс +Шотландия

The UK (England+Wales+Scotland+Northern Ireland)

Ответ: C