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: 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'}]