Answer the following question: Information: - Sweden, officially the Kingdom of Sweden (Swedish: ), is a Scandinavian country in Northern Europe. It borders Norway to the west and Finland to the east, and is connected to Denmark in the southwest by a bridge-tunnel across the Oresund. At , Sweden is the third-largest country in the European Union by area, with a total population of 10.0 million. Sweden consequently has a low population density of , with the highest concentration in the southern half of the country. Approximately 85% of the population lives in urban areas. - Stockholm City Centre ("Stockholms innerstad", "Innerstaden", "Inre staden") is the city centre of Stockholm in Sweden. The entire city of Stockholm is also the centre of the Stockholm Metropolitan Area. - Solna strand ( known as Vreten until 18 August 2014 ) is a subway station on the Stockholm metro blue line . It was opened in 1985 and is located in the Huvudsta region of the Solna Municipality . The platform is located in bedrock , 28 m ( 92 ft ) below ground level under Vretenvagen . The entrance is in the north end at Korta gatan . The station 's theme is defined by artwork created by the Japanese - Swedish sculptor Takashi Naraha in 1985 called Himmelen av kub ( The heaven of cube ) . It is located in Solna Strand , a former industrial area that has office buildings today . - Stockholm County ("Stockholms lan") is a county or "lan" (in Swedish) on the Baltic sea coast of Sweden. It borders Uppsala County and Sodermanland County. It also borders Malaren and the Baltic Sea. The city of Stockholm is the capital of Sweden. Stockholm County is divided by the historic provinces of Uppland (Roslagen) and Sodermanland (Sodertorn). More than one fifth of the Swedish population lives in the county. Stockholm County is also one of the statistical "riksomraden" (national areas) according to , Nomenclature of Territorial Units for Statistics within the EU. With more than two million inhabitants, Stockholm is the most densely populated county of Sweden. - The Stockholm metro (literally: "Stockholm's Tunnel Rail") is a metro system in Stockholm, Sweden. The first line opened in 1950, and today the system has 100 stations in use, of which 47 are underground and 53 above ground. There are three coloured main lines on the tube maps. These do however form seven actual routes (with different termini). Routes number 17, 18 and 19 (belonging to the green main line), 13 and 14 (red main line) and 10 and 11 (blue main line) all go through Stockholm City Centre in a very centralized metro system. All seven actual lines use The "T-Centralen" hub station. Apart from this Central Station for the metro, there exists just one other junction, the "Fridhemsplan" station, although both the green and red lines are mutually accessible at the "Slussen" and "Gamla Stan" stations. - Solna Municipality is a municipality in Stockholm County in east central Sweden, located just north of the Stockholm City Centre. Its seat is located in the town of Solna, which is a part of the Stockholm urban area. - Huvudsta is a suburb of Stockholm in Solna Municipality. In Huvudsta, near Vasastaden in Stockholm, stands the Karlberg Castle which was built in the 17th century. - The Stockholm urban area is the largest and most populous of the statistical localities or urban areas in Sweden. It has no administrative function of its own, but constitutes a continuous built-up area, which extends into 11 municipalities in Stockholm County. It contains the municipal seats of 10 of those. As of 31 December 2010, the population in the Stockholm urban area was 1,372,565 inhabitants, the area , and the population density 3,597inh/km. Stockholm urban area is not the same as Metropolitan Stockholm, which is a much larger area. - T-Centralen (Swedish for "The T-Central"; T being an abbreviation for "tunnelbana", the Swedish word for "underground" or "subway") is a metro station that forms the heart of the Stockholm metro system, in the sense that it is the only station where all three of the system's lines meet. That, its central location, and its connections with other modes of transport make it the most used metro station in Stockholm. The station is located in the Norrmalm borough of Stockholm, between Sergels torg (Sergel's Square) and the street of Vasagatan. - Stockholm (or ) is the capital of Sweden and the most populous city in the Nordic countries; 932,917 people live in the municipality, approximately 1.5 million in the urban area, and 2.3 million in the metropolitan area. The city is spread across 14 islands on the coast in the southeast of Sweden at the mouth of Lake Malaren, by the Stockholm archipelago and the Baltic Sea. The area has been settled since the Stone Age, in the 6th millennium BC, and was founded as a city in 1252 by a Swedish statesman Birger Jarl. It is also the capital of Stockholm County. After reading the paragraphs above, we are interested in knowing the entity with which 'solna strand metro station' exhibits the relationship of 'instance of'. Find the answer from the choices below. Choices: - abbreviation - age - archipelago - area - capital - century - city - coast - country - county - county of sweden - lake - line - main line - metro station - metropolitan - municipality - population - sea - seat - seven - square - station - statistics - street - suburb - three - tunnel - union - urban area - word
Answer:
metro station