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
Chemical regulation of respiration is not affected by? 
Select and explain. 
A. pH, B. pCO2, C. pO2, D. BP
D: BP
Answer: D: BP 
Explanation: Ans. is 'd' i.e., BP