This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
The ventilatory response to hypoxia: 
Select and explain. 
A. Is independent of PaCO2, B. Is more dependent on aortic than carotid chemoreceptors, C. Is exaggerated by hypoxia of the medullary chemoreceptors, D. Bears an inverse linear relationship to arterial oxygen content
D: Bears an inverse linear relationship to arterial oxygen content
Answer: D: Bears an inverse linear relationship to arterial oxygen content 
Explanation: Ans. D. Bears an inverse linear relationship to arterial oxygen contentAn inverse relationship exists between hypoxia-induced hyperventilation and oxygen content. Hypoxia-induced hyperventilation is dependent on PaCO2 and more on carotid than aortic chemoreceptors.