What was the name of the atomic bomb dropped on Hiroshima?

The atomic bomb dropped on Hiroshima was named "Little Boy." This bomb, which utilized uranium-235 as its fissile material, was dropped by the United States on August 6, 1945. The use of the bomb marked a significant moment in World War II, as it was the first real-world application of nuclear technology in warfare. The resulting destruction and loss of life were catastrophic, leading to Japan's eventual surrender.

The other names mentioned are related but refer to different aspects of the atomic program. "Fat Man" was the bomb dropped on Nagasaki just a few days later, on August 9, 1945, and it used plutonium as its fissile material. "Enola Gay" was the name of the B-29 bomber that carried "Little Boy" to Hiroshima. "Big Boy" is not historically recognized as the name of any atomic bomb and is an incorrect choice.