This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Environment and health, Subject name: Social & Preventive Medicine
[{'content': 'Curie is the unit for - \nSelect and explain. \nA. Radiation emitted, B. Radiation absorbed, C. Radioactivity, D. All of the above', 'role': 'user'}, {'content': "Answer: C \nExplanation: Park's textbook of preventive and social medicine 23rd edition. * The activity of a radioactive material is the number of nuclear disintegration per unit time.the unit of activity was Curie earlier and Becquerel now.", 'role': 'assistant'}]