Final answer:
The term for HbO₂ is (B) oxyhemoglobin, which is the form of hemoglobin bound to oxygen and responsible for transporting it to the tissues.
Step-by-step explanation:
The term for HbO₂ is oxyhemoglobin. The formula Hb + O₂ → HbO₂ explains the process where hemoglobin (Hb), which is in a reduced state and not bound to oxygen, associates with oxygen molecules in the lungs to form oxyhemoglobin. This form of hemoglobin is what carries oxygen to the various tissues where it will be released.
Other forms of hemoglobin include reduced hemoglobin (HHb), carboxyhemoglobin, and carbaminohemoglobin, but these describe hemoglobin bound to substances other than oxygen.