Q:Information:  - Zealand is the largest (7,031 km) and most populated island in Denmark with a population of 2,267,659 (39% of Denmark's total as of January 2016).  - The Czech Republic, also known by the short name Czechia, is a nation state in Central Europe bordered by Germany to the west, Austria to the south, Slovakia to the east and Poland to the northeast. The Czech Republic covers an area of with mostly temperate continental climate and oceanic climate. It is a unitary parliamentary republic, has 10.5 million inhabitants and the capital and largest city is Prague, with over 1.2 million residents. The Czech Republic includes the historical territories of Bohemia, Moravia, and Czech Silesia.  - Øresund or Öresund is a strait which forms the DanishSwedish border, separating Sjælland (Denmark) from Skåne (Sweden).  The strait has a length of and the width varies from to . It is wide at its narrowest point between Helsingør in Denmark and Helsingborg in Sweden.   - The S-train is a type of hybrid urban and suburban railway. Some of the larger S-train systems provide service similar to rapid transit systems, while smaller ones often resemble commuter or even regional rail. They are especially common in Germany, where they are known as S-Bahn, which in the 1930s was an abbreviation of either "Schnellbahn", "Stadtbahn" or "Stadtschnellbahn", depending on the city, but they must not be confused with "U-Stadtbahns". Similar S-train systems exist also in Denmark, there known as S-tog, the Czech Republic as Esko, Switzerland and Austria also as S-Bahn, and northern Italy as Servizio ferroviario followed by either the word "metropolitano" (in Turin) or "surburbano" (in Milano).  - Amager (or, especially among older speakers) is a Danish island in the Øresund. The Danish capital, Copenhagen, is partly situated on Amager, which is connected to the much larger island of Zealand by five bridges. Amager also has a connection across the Øresund to Sweden, the Øresund Bridge. Its western part begins with a tunnel from Amager to another Danish island, Peberholm. Copenhagen Airport is located on the island, around from Copenhagen city centre. Amager is the largest island in the Øresund, and the only one with a large population. , 192,709 people live on the island, including its northern tip, Christianshavn. The northern part is included in the Copenhagen municipality. The middle part comprises Tårnby municipality, and Dragør municipality is located on the southeast part of the island. Most of the western part is land that was reclaimed from the sea from the 1930s-1950s. This enlargement, from the shallow sound towards Zealand, is known as "Kalveboderne". The enlargement has never been built-up and its soil isn't suitable for agricultural use. However the area between Dragør town and the airport is cultivated land of high quality. Amager has in the past been referred to as the "kitchen of Copenhagen". At the border of the enlargement there is an old beech forest, "Kongelunden" (The King's Grove).  - 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 Öresund. 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.  - B is a service on the S - train network in Copenhagen . It runs between Farum and Høje Taastrup and provides stopping services on the S - train system 's Farum radia and Tåstrup radial . B is one of the base services on the network , running every 20 minutes from about 5:00 to 1:00 every day , and every 10 minutes between about 6:00 to 19:00 on weekdays . On Friday and Saturday nights there is also an 30 minutes service throughout the night .  - Rapid transit, also known as heavy rail, metro, subway, tube, or underground, is a type of high-capacity public transport generally found in urban areas. Unlike buses or trams, rapid transit systems are electric railways that operate on an exclusive right-of-way, which cannot be accessed by pedestrians or other vehicles of any sort, and which is often grade separated in tunnels or on elevated railways.  - Malmö  is the capital and largest city of the Swedish county of Scania. Malmö is the third largest city in Sweden, after Stockholm and Gothenburg, and the 6th biggest city in the Nordic countries, with a population of above 300,000. The Malmö Metropolitan Region is home to 700,000 people, and the Øresund Region, which includes Malmö, is home to 3.9 million people.  - MILAN ("milan(e)" is French for kite) is a European anti-tank guided missile. Design of the MILAN started in 1962, it was ready for trials in 1971, and was accepted for service in 1972. It is a wire guided SACLOS (semi-automatic command to line-of-sight) missile, which means the sight of the launch unit has to be aimed at the target to guide the missile. The MILAN can be equipped with a MIRA or MILIS thermal sight to give it night-firing ability.  - Copenhagen (, ); ) is the capital and most populated city of Denmark. It has a municipal population of 591,481 and a larger urban population of 1,280,371. The Copenhagen metropolitan area has just over 2 million inhabitants. The city is situated on the eastern coast of the island of Zealand; another small portion of the city is located on Amager, and is separated from Malmö, Sweden, by the strait of Øresund. The Øresund Bridge connects the two cities by rail and road.  - Regional rail, also known as local trains and stopping trains, are passenger rail services that operate between towns and cities. These trains operate with more stops over shorter distances than inter-city rail, but fewer stops and faster service than commuter rail. Regional rail services operate beyond the limits of urban areas, and either connect similarly-sized smaller cities and towns, or cities and surrounding towns, outside or at the outer rim of a suburban belt.  - Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of , and has a largely temperate seasonal climate. With about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular immigration destination in the world. Germany's capital and largest metropolis is Berlin. Other major cities include Hamburg, Munich, Cologne, Frankfurt, Stuttgart and Düsseldorf.  - The Copenhagen metropolitan area (or Metropolitan Copenhagen) is a large commuter belt (the area in which it is practical to commute to work) surrounding Copenhagen, the capital of Denmark. It is known to include Copenhagen Municipality, Frederiksberg and surrounding municipalities stretching westward across Zealand. It has densely-populated core surrounded by suburban settlements.  - Switzerland, officially the Swiss Confederation, is a federal republic in Europe. It consists of 26 cantons, and the city of Bern is the seat of the federal authorities.  The country is situated in Western-Central Europe, and is bordered by Italy to the south, France to the west, Germany to the north, and Austria and Liechtenstein to the east. Switzerland is a landlocked country geographically divided between the Alps, the Swiss Plateau and the Jura, spanning an area of . While the Alps occupy the greater part of the territory, the Swiss population of approximately eight million people is concentrated mostly on the plateau, where the largest cities are to be found: among them are the two global cities and economic centres Zürich and Geneva.  - Denmark is a Scandinavian country in Europe. The southernmost and smallest of the Nordic countries, it is south-west of Sweden and south of Norway, and bordered to the south by Germany. The Kingdom of Denmark is the sovereign state that comprises Denmark proper and two autonomous constituent countries in the North Atlantic Ocean: the Faroe Islands and Greenland. Denmark has a total area of , and a population of 5.7 million. The country consists of a peninsula, Jutland, and an archipelago of 443 named islands, with the largest being Zealand and Funen. The islands are characterised by flat, arable land and sandy coasts, low elevation and a temperate climate.  - Italy, officially the Italian Republic, is a unitary parliamentary republic in Europe. Located in the heart of the Mediterranean Sea, Italy shares open land borders with France, Switzerland, Austria, Slovenia, San Marino and Vatican City. Italy covers an area of and has a largely temperate seasonal climate and Mediterranean climate; due to its shape, it is often referred to in Italy as "lo Stivale" (the Boot). With 61 million inhabitants, it is the fourth most populous EU member state.  - Turin ( pronounced ) is a city and an important business and cultural centre in northern Italy, capital of the Piedmont region and was the first capital city of Italy. The city is located mainly on the western bank of the Po River, in front of Susa Valley and surrounded by the western Alpine arch and by the Superga Hill. The population of the city proper is 892,649 (August 2015) while the population of the urban area is estimated by Eurostat to be 1.7 million inhabitants. The Turin metropolitan area is estimated by the OECD to have a population of 2.2 million.  - The Øresund/Öresund/Oresund Bridge (, , hybrid name: "") is a combined railway and motorway bridge across the Øresund strait between Sweden and Denmark. The bridge runs nearly from the Swedish coast to the artificial island Peberholm in the middle of the strait. The crossing is completed by the Drogden Tunnel from Peberholm to the Danish island of Amager.    After reading the paragraphs above, we are interested in knowing the entity with which 'b ' exhibits the relationship of 'instance of'. Find the answer from the choices below.  Choices: - abbreviation  - airport  - arch  - area  - august  - belt  - berlin  - border  - bridge  - capital  - city  - confederation  - country  - eight  - federal republic  - five  - forest  - front  - grade  - home  - hybrid  - island  - italy  - line  - member  - member state of the european union  - metropolitan  - metropolitan area  - municipality  - name  - nation  - peninsula  - people  - plateau  - point  - population  - public  - rapid  - region  - republic  - river  - sea  - service  - sound  - sovereign state  - state  - strait  - territory  - town  - train  - transport  - two  - union
A:
line