Answer:
option d. All of these
Explanation:
The amount of oxygen attached to hemoglobin can be determined by the the partial pressure of carbon dioxide and as well as that of oxygen in the sample of the blood.
The capacity of hemoglobin to deliver or to carry oxygen depends on many
factors like pH of the blood, body temperature,factors related to environment, etc. An increase in temperature or carbon dioxide or pH results in decrease in oxygen affinity towards hemoglobin.
