Which of These Statements Describes Haemoglobin

Multiple Choice

Which of these statements describes haemoglobin

A) It combines preferentially with O₂ over any other molecules.
B) When combined with carbon dioxide, it is known as oxyhaemoglobin.
C) It plays a critical role in determining the amount of O₂ that is exchanged between alveoli and blood.
D) It combines preferentially with CO₂ when the partial pressure of O₂ is high in arterial blood.