Which of These Statements Does NOT Describe Haemoglobin

Multiple Choice

Which of these statements does NOT describe haemoglobin

A) Its presence keeps the blood PO₂ low and favours O₂ movement into the blood.
B) It can combine with O₂, CO₂, H⁺, and CO.
C) It unloads less O₂ in the presence of increased tissue acidity.
D) It unloads more O₂ when body temperature is higher.