GENERAL KNOWLEDGE

Detailed explanation-1: -Baku is the capital and largest city of Azerbaijan, as well as the largest city on the Caspian Sea and of the Caucasus region.

Detailed explanation-2: -Azerbaijan is a small nation located in the Caucasus region, straddling Europe and Asia. Situated at a geographic crossroads, the land was ruled by many empires before it first became a democratic republic in 1918, following World War I. Just two years later, however, it was absorbed into the Soviet Union.