Which of the following types of hemoglobin has a higher affinity for oxygen than adult hemoglobin (HbA)?

A Fetal hemoglobin (HbF) ✓
B Hemoglobin A2 (HbA2)
C Hemoglobin S (HbS)
D Hemoglobin C (HbC)

Explanation

Fetal hemoglobin (HbF) has a higher affinity for oxygen than adult hemoglobin (HbA), allowing the fetus to extract oxygen from the mother's bloodstream.

Source

Berne and Levy Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Easy MEDICAL Confidence: high