Which statement is correct about haemoglobin’s affinity for the gases carbon dioxide, carbon monoxide and oxygen?
- AHighest affinity: carbon monoxide; then carbon dioxide; lowest affinity: oxygen
- BHighest affinity: carbon monoxide; then oxygen; lowest affinity: carbon dioxide
- CHighest affinity: oxygen; then carbon dioxide; lowest affinity: carbon monoxide
- DHighest affinity: oxygen; then carbon monoxide; lowest affinity: carbon dioxide