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

Options :

1. High pO₂ , low pCO₂, less H⁺, lower temperature

2. Low pO₂, high pCO₂, more H⁺, higher temperature

3. High pO₂, high pCO₂, less H⁺, higher temperature

4. Low pO₂, low pCO₂, more H⁺, higher temperature