In September, 2014, the historic referendum for independence was conducted in

The correct answer is (d). Scotland held a referendum on independence on September 18, 2014. The result was 55.3% to 44.7% in favor of remaining part of the United Kingdom.

(a) Ireland is an island in the North Atlantic Ocean. It is divided into two political entities: the Republic of Ireland (officially named Ireland) and Northern Ireland, which is part of the United Kingdom.

(b) Ukraine is a country in Eastern Europe. It is the second-largest country in Europe by area after Russia.

(c) Hong Kong is a special administrative region of China. It was a British colony from 1842 to 1997.