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: Physiology
Co, causes? 
Select and explain. 
A. Decrease respiratory drive, B. Reduces cerebral blood flow, C. Depresses vasomotor centre, D. Respiratory stimulation by central chemoreceptors
D: Respiratory stimulation by central chemoreceptors
Answer: D: Respiratory stimulation by central chemoreceptors 
Explanation: Respiratory stimulation by central chemoreceptors REF: Ganong's 22' ed chapter 31 Co, causes direct stimulation of vasomotor centre