The dissociation curve of haemoglobin is:

$A$ large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This $O_2$

The Hamburger phenomenon is also known as:

During oxygen transport,the oxyhaemoglobin at the tissue level liberates oxygen to the cells because

Given below are two statements:
Statement $I$: The relationship between $HbO_2$ saturation and oxygen tension $(pO_2)$ is called the oxygen-dissociation curve.
Statement $II$: The oxygen dissociation curve shifts towards the right due to a decrease in $ppCO_2$ and a decrease in temperature.
In the light of the above statements,choose the most appropriate answer from the options given below.

What are the favorable conditions in the alveoli for the formation of oxyhemoglobin?