This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Metabolism of protein and amino acid, Subject name: Biochemistry
Hb saturation with oxygen is mostly dependent on 
Select and explain. 
A. pO2, B. pCO2, C. HCO3-levels, D. Hb %
A: pO2
Answer: A: pO2 
Explanation: Increased pH (decreased H+), decreased temperature, decreased PaCO2, and decreased 2,3-DPG will increase oxygen binding to the haemoglobin Ref: Biochemistry by U. Satyanarayana 3rd edition Pgno : 198,199