Answer:
b. Nitrogen > Carbon dioxide > Oxygen
Step-by-step explanation:
Nitrogen is the least soluble gas in blood, followed by carbon dioxide, and then oxygen, which is the most soluble gas. This is because the solubility of a gas in a liquid depends on several factors, including the partial pressure of the gas in the air and the solubility of the gas in the liquid. The partial pressure of nitrogen in air is much higher than oxygen or carbon dioxide, but it is not very soluble in blood. On the other hand, carbon dioxide is much more soluble in blood than nitrogen or oxygen, but less soluble than oxygen. Therefore, the correct order of gas solubilities in blood is Nitrogen > Carbon dioxide > Oxygen.