The correct answer is option 1, Iran. Dasht-e Kavir Desert, also known as the Great Salt Desert, is one of the two major deserts in Iran, with the other being the Dasht-e Lut Desert. It is located in the central part of Iran, mostly in the provinces of Khorasan, Semnan, Isfahan, and Yazd.
Option 2, Saudi Arabia, is incorrect. Saudi Arabia is home to the Rub` al Khali (Empty Quarter) desert, which is one of the largest sand deserts in the world.
Option 3, Iraq, is also incorrect. While Iraq does have some desert regions, Dasht-e Kavir is not located in Iraq.
Option 4, Sudan, is incorrect as well. Sudan has the Sahara Desert, which is the largest hot desert in the world, but Dasht-e Kavir is not located there.
Therefore, the correct answer is option 1, Iran.