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': 'McArdle’s maximum allowable sweat rate is \nSelect and explain. \nA. 4 lit /4 hours, B. 4 lit /1 hours, C. 4.5 lit/4 hours, D. 4.5 lit/8 hours', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]