World Geography and Capitals

Oslo is the capital of Norway. Bergen is another major Norwegian city but not the capital. Stockholm is Sweden's capital. 'Cristiania' is Oslo's historical name (1624-1924), making it a plausible but outdated option.

Country code 20 belongs to Egypt. Note there's a typo in option A ('Afanistan' should be 'Afghanistan'). Zambia uses 260, China uses 86, and Afghanistan would use 93. Egypt has used code 20 since the international dialling system was established.

San Salvador is the capital city of El Salvador. Santo Domingo is Dominican Republic's capital, Saint George's is Grenada's capital, and Pristina is Kosovo's capital.

Budapest is the capital of Hungary. Vilnius is Lithuania's capital, Tallinn is Estonia's capital, and Libreville is Gabon's capital.

Podgorica is the capital and largest city of Montenegro, a country in southeastern Europe on the Adriatic coast. Palau is an island country in the Pacific with capital Ngerulmud. Romania's capital is Bucharest. Senegal's capital is Dakar.

Vientiane is the capital and largest city of Laos, a Southeast Asian country. Haiti's capital is Port-au-Prince, Libya's is Tripoli, and Latvia's is Riga - all incorrect.

Brussels is the capital of Belgium and headquarters of the European Union. Buenos Aires is the capital of Argentina, Zagreb is Croatia's capital, and Melekeok is Palau's capital.

Tehran is the capital of Iran. Baghdad is the capital of Iraq, Jerusalem is Israel's claimed capital, and Bishkek is the capital of Kyrgyzstan.

Baghdad is the capital city of Iraq, situated on the Tigris River. It was founded in the 8th century and became the capital of the Abbasid Caliphate, remaining one of the most important cities in the Arab world.

Jerusalem is the capital of Israel, though this status is not internationally recognized by all countries due to the ongoing Israel-Palestine conflict. It is a holy city for Judaism, Christianity, and Islam.

Abuja is the capital of Nigeria, a West African country. It replaced Lagos as the capital in 1991 in a planned move to create a more centrally located and neutral capital city that better represents Nigeria's ethnic and religious diversity.

Kampala is the capital and largest city of Uganda, located in East Africa. Yemen's capital is Sana'a, Taiwan's capital is Taipei, and Tunisia's capital is Tunis. Uganda is a landlocked country bordered by Kenya, Tanzania, and other East African nations.

ASEAN (Association of Southeast Asian Nations) has its secretariat headquarters in Jakarta, Indonesia. New Delhi is India's capital, Colombo is Sri Lanka's capital, and Kathmandu is Nepal's capital.

The Nuclear Security Summit in April 2010 was hosted in Washington by U.S. President Barack Obama. This landmark summit brought together 47 countries to discuss securing nuclear materials and preventing nuclear terrorism. Subsequent summits were held in Seoul (2012), The Hague (2014), and other locations.

The Nuclear Security Summit held in April 2010 took place in Washington D.C. and was hosted by U.S. President Barack Obama. This summit focused on securing nuclear materials and preventing nuclear terrorism, with 47 nations participating.