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: Pathology
[{'content': 'A single whole body dose of how many rads could result in death - \nSelect and explain. \nA. 100 rads, B. 200 rads, C. 300 rads, D. 500 rads', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., 300 rads o Lethal dose for humans exposed to a single dose of highly penetrating electromagnetic radiation delivered over a period of less than 24 hours is 250 to 400 rad.", 'role': 'assistant'}]