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 rate at which the alveolar concentration of an anaesthetic approaches inspired concentration is a function of all except 
Select and explain. 
A. Alveolar ventilation, B. Water solubility of agent, C. Cardiac output, D. Saturated vapour pressure
D: Saturated vapour pressure
Answer: D: Saturated vapour pressure 
Explanation: Saturated vapour pressure does not determine the rate of uptake of anaesthetic agent from inspired gas into the blood.