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: Social & Preventive Medicine
[{'content': 'Unit of one of radiation absorbed is – \nSelect and explain. \nA. Grey, B. Roengten, C. Curie, D. Bequerrel', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Units of potency\n\nRoentgen and coulomb per kilograme → Units of exposure. It is the amount to which a person is exposed.\nRed and Gray\xa0 → Units of absorbed dose. It is the amount which is absorbed per gram of tissue.\nRem and Sievert\xa0 → Product of the absorbed dose and the modifying factor. Represent the degree of potention danger to health.', 'role': 'assistant'}]