Q. Which following countries correspond to the historical region "Mesopotamia"?
Answer: Iraq, Kuwait, Syria and Turkey
Notes: Iraq, Kuwait, Syria and Turkey are the countries that correspond to the historical region "Mesopotamia". Mesopotamia is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the Fertile Crescent. In terms of the modern nation-state, it corresponds with much of Iraq, Kuwait, the eastern parts of Syria, Southeastern Turkey, and regions along the Turkish–Syrian and Iran–Iraq borders.