World Facts and Geography

Spain's national anthem 'Marcha Real' is one of the few national anthems in the world that has no official lyrics. While other countries like Thailand, Finland, and Bhutan all have words in their national anthems, Spain's anthem is purely instrumental, though unofficial lyrics have been written at various times.

Bahrain is an island nation in the Persian Gulf that does not have a railway system. Its transportation relies on roads and air travel. Malaysia has an extensive rail network, Hawaii is a US state with some rail infrastructure, and Algeria has railway connections. Bahrain's small size and island geography have influenced its transportation choices.

Saudi Arabia is a desert country with no permanent rivers flowing on its surface. The country relies on wadis (dry riverbeds that fill temporarily during rainfall) and has developed extensive desalination and water conservation systems. Argentina, Poland, and China all have major river systems - Argentina has the Paraná, Poland has the Vistula, and China has the Yangtze and Yellow Rivers.

Ireland is famously known for having no native snake species. This is due to its geographic isolation and post-glacial climate - snakes never managed to recolonize the island after the last Ice Age. The other options are problematic: California is a US state, not a country; West Indies is a region; and Borneo is an island shared by multiple countries. Ireland is the only correct option as a country without native snakes.

Andorra is a small landlocked country between France and Spain in the Pyrenees mountains with no airport. The nearest airports are in Barcelona, Spain, and Toulouse, France. Malawi has multiple airports including Kamuzu International Airport in Lilongwe. Mexico has numerous international airports including Mexico City International Airport. Mali has international airports in Bamako and other cities.

Monaco is one of the few countries in the world with no standing army; it relies on France for defense. Nigeria has one of Africa's largest militaries with over 200,000 personnel. Guinea maintains armed forces for national security. Romania has a modern military as a NATO member since 2004. Monaco's defense is guaranteed by France under a 1963 treaty.

Norway experiences the 'Midnight Sun' phenomenon north of the Arctic Circle during summer months when the sun doesn't set for several weeks. Italy has normal day-night cycles year-round. Bolivia, near the equator in the Southern Hemisphere, has consistent sunset times year-round. Borneo is not a country but an island shared by Indonesia, Malaysia, and Brunei; all areas have normal sunsets. This is a seasonal phenomenon, not a permanent absence of sunset.

This appears to be a subjective/joke question with no factual basis. Hygiene levels are complex metrics involving sanitation infrastructure, public health data, and international indices. There is no objective basis to label any of these countries as 'most unhygienic'. This is likely testing answer patterns rather than knowledge.

Adolf Hitler was born in Braunau am Inn, Austria-Hungary (now Austria) in 1889, making him Austrian by birth. He later obtained German citizenship and became the leader of Germany, which often causes confusion about his national origin.

Brazil has the largest Japanese diaspora community outside Japan, estimated at over 1.5 million people. This resulted from large-scale Japanese immigration to Brazil between 1908-1970, primarily for coffee plantation work. The community is concentrated in São Paulo state and has significant cultural influence, especially in Liberdade district.

South Africa is home to Tugela Falls (the world's second-highest waterfall at 948m), hosted the first African FIFA World Cup in 2010, and produced the Cullinan Diamond (the largest gem-quality diamond ever found at 3,106 carats). Options A, B, and C refer to landmarks in UAE, Bahrain, and Saudi Arabia respectively.

Canada is the world's second-largest country by land area after Russia, covering nearly 10 million square kilometers. Despite its vast size, it has a population of only about 38 million, making it one of the least densely populated countries globally at approximately 4 people per square kilometer.

India is the world's most populous democracy with over 1.4 billion people and a democratic government system. While China has a larger total population, it is not a democracy. Brazil and the USA have democratic systems but significantly smaller populations than India.