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
[{'content': 'Oxygen carrying capacity of blood is largely determined by- \nSelect and explain. \nA. Hb level, B. Amount of CC2 in blood, C. Acidosis, D. Plasma concentration', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Hb level(Ref: Ganong, 25th ed/p.640))Oxygen is transported in blood in two forms. They are,#Dissolved form (3%)#Combined with hemoglobin (97%)', 'role': 'assistant'}]