This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Phosphorous 32 emitts \nSelect and explain. \nA. Beta particle, B. Alpha particle, C. Neutron, D. X-rays', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A beta particle also called beta ray or beta radiation is a high-energy,\nhigh-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.', 'role': 'assistant'}]