How much $CO_2$ is delivered to the alveoli by every $100 \;ml$ of deoxygenated blood (in $;ml$)?

Blood leaving the lungs is rich in:

What will be the $pO_{2}$ and $pCO_{2}$ in atmospheric air as compared to alveoli?

What is the partial pressure of oxygen $(pO_2)$ in the alveoli of the lungs compared to the blood?

The given figure shows a small part of the human lung where gas exchange occurs. Identify the part $A, B, C,$ or $D$ correctly with its function from the given options.

What is the partial pressure of Oxygen $(PO_2)$ and Carbon dioxide $(PCO_2)$ in the alveoli?