Select the favourable conditions required for the formation of oxyhaemoglobin at the alveoli.

1. A. Low pO 2 , high pCO 2 , more H + , higher temperature
2. B. High pO 2 , high pCO 2 , less H + , higher temperature
3. C. Low pO 2 , low pCO 2 , more H + , higher temperature
4. D. High pO 2 , low pCO 2 , less H + , lower temperature

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