J. Robert Oppenheimer was the scientific director of the Manhattan Project, the U.S. research program during World War II that developed the first atomic bomb. The project culminated in the bombings of Hiroshima and Nagasaki in 1945.
Other Options Explained:
(A) Edward Teller – Known as the "father of the hydrogen bomb" (thermonuclear bomb), but not the atomic bomb.
(C) Samuel Cohen – Developed the neutron bomb, not the atomic bomb.
(D) Wernher von Braun – A German-American rocket scientist who developed the V-2 rocket and later contributed to the U.S. space program, but not the atomic bomb.
Thus, the correct answer is (B) J. Robert Oppenheimer.
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