Question

the first atomic bomb used in war was detonated in what city?
hiroshima
kokura
nagasaki

Explanation:

The first atomic bomb used in war (during World War II) was detonated in Hiroshima on August 6, 1945. Nagasaki was the second city to be bombed with an atomic bomb, and Kokura was a target that was not bombed as the mission was diverted.

Answer:

A. Hiroshima