Which of the following is an example of nuclear fusion?
A. Hydrogen-1 and hydrogen-2 combine to form helium-3.
B. Polonium-210 decays into lead-206 and an alpha particle.
C. Carbon-14 breaks down into a beta particle and nitrogen-14.
D. Uranium-235 and a neutron produce barium-141, krypton-92, and three neutrons.



The answer is "A" . Because nuclear fusion is defined as the combining of two or more nucleus to form a single nuclei.
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