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
Physiologial response to smokking are all except 
Select and explain. 
A. Decreased HDL, B. Increased hematocrit, C. Increased heart rate and increased catecholamine release, D. Decreased caboxyhemoglobin
D: Decreased caboxyhemoglobin
Answer: D: Decreased caboxyhemoglobin 
Explanation: None