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': 'Which of the following is a pure beta paicle emitter? \nSelect and explain. \nA. Co 6deg, B. 1131, C. P 32, D. Gold', 'role': 'user'}, {'content': 'Answer: C \nExplanation: P 32 REF: Meredith radiation physics and nuclear medicine p 28 Phosphorus-32 is a sho-lived high energy beta emitter Beta rays --- , 32 P S , 90 r y 90 Beta and gamma Ra - 226 , Au-198 , I - 131 Gamma Ir- 192, Co-60, Cs - 137, Xe - 133, 1-123, I - 132, Tc- 99, Ga- 70, T1-201, Rn - 222, Cr -51, k - 81 N N, Gamma Cf - 252, Ta-', 'role': 'assistant'}]