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: Anaesthesia
The most important determinant of carbon dioxide elimination is 
Select and explain. 
A. Minute ventilation, B. Fresh gas flow, C. Expiratory reserve volume, D. Vital capacity
B: Fresh gas flow
Answer: B: Fresh gas flow 
Explanation: Fresh gas flow is important determinant of carbon dioxide elimination in breathing circuits.