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
O2 delivery to tissues depends on all, except 
Select and explain. 
A. Cardiac output, B. Type of fluid administered, C. Hemoglobin concentration, D. Affinity of hemoglobin for O2
B: Type of fluid administered
Answer: B: Type of fluid administered 
Explanation: The oxygen dissociation curve can be shifted right or left by a variety of factors. A right shift indicates decreased oxygen affinity of haemoglobin allowing more oxygen to be available to the tissues. A left shift indicates increased oxygen affinity of haemoglobin allowing less oxygen to be available to the tissues Ref: guyton and hall textbook of medical physiology 12 edition page number:354,355,356