Question

The first nuclear explosion in history had the code name of _____.
Alpha
Neo
Manhattan
Trinity

Answer 1

The first nuclear explosion in history had the code name of "Trinity". "Manhattan" was the name given to the project that was meant to create the bomb in the first place. 

Answer 2

The first nuclear explosion in history had the code name of "Trinity". Trinity was the code name of the first detonation of a nuclear weapon. It was led by the United States Army as part of the Manhattan Project. The code name "Trinity" was assigned by J. Robert Oppenheimer, the director of the Los Alamos Laboratory, inspired by the poetry of John Donne.