I: | Haemoglobin in humans adapted to very high altitudes has a lower binding affinity for oxygen than that found in humans living at the sea level. |
II: | Lower affinity of haemoglobin to oxygen means more oxygen can bind to haemoglobin even at low partial pressures |
1. | Both I and II are correct and II explains I |
2. | Both I and II are correct but II does not explain I |
3. | I is correct but II is incorrect |
4. | Both I and II are incorrect |