The correct answer is 1 only. Key Points Prime Meridian Line is also known as International Meridian or Greenwich Meridian. The line passes through England's Royal Greenwich Observatory. Line situated at Zero degree longitude determines the International Standard Time. Its value is 0° longitude and from it, we count 180° eastward as well as 180° westward. The Prime Meridian and 180° meridian divide the earth into two equal halves, the Eastern Hemisphere and the Western Hemisphere. Therefore, the longitude of a place is followed by the letter E for the east and W for the west. Important Points In Europe, Prime Meridian passes through the United Kingdom, France, Spain. Hence, statement 2 is Not correct. In Africa, it passes through Algeria, Mali, Burkina Faso, Ghana and Togo. Hence, statement 1 is correct. ​Additional Information In 1884 the Prime Meridian was defined by the position of the large 'Transit Circle' telescope in the Observatory’s Meridian Observatory. Forty-one delegates from 25 nations met in Washington DC for the International Meridian Conference. By the end of the conference, Greenwich had won the prize of Longitude 0º by a vote of 22 to 1 against (San Domingo), with 2 abstentions (France and Brazil). Why does the Prime Meridian run through Greenwich? There were two main reasons for the choice. The first was the fact that the USA had already chosen Greenwich as the basis for its own national time zone system. The second was that in the late 19th century, 72% of the world's commerce depended on sea-charts which used Greenwich as the Prime Meridian.