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: Medicine
[{'content': 'Phosphorous — 32 emits: \nSelect and explain. \nA. Beta particles, B. Alfa particles, C. Neutrons, D. X-rays', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]