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A. γ-emission
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B. Proton
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C. α-emission
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D. β-emission
Explanation
The radioactive decay equation shows a parent nucleus (91Pa^233) decaying into a daughter nucleus (92U^233) with the emission of a particle.
The parent nucleus has an atomic number of 91 (Protactinium), and the daughter nucleus has an atomic number of 92 (Uranium).
This increase in atomic number indicates that a beta particle (β) has been emitted.
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