This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Air, Light, Sound, Housing, Radiation, Waste Disposal, Subject name: Social & Preventive Medicine
McArdle's Maximum Allowable sweat rate:- 
Select and explain. 
A. < 4.5 litre/4 hours, B. < 3.0 litre/4 hours, C. < 3.5 litre/4 hours, D. < 5.0 litre/4 hours
A: < 4.5 litre/4 hours
Answer: A: < 4.5 litre/4 hours 
Explanation: McArdle's Index: - It is an index of thermal comfo. Max P4SR (Predictable 4 hour sweat rate): <4.5lit/4hours. Beyond this death of person is imminent.