How does fetal hemoglobin (HbF) adapt to the low oxygen environment in the placenta?

A It has a lower affinity for oxygen than adult hemoglobin
B It has a higher affinity for oxygen than adult hemoglobin ✓
C It binds to carbon monoxide more readily than adult hemoglobin
D It releases oxygen more readily than adult hemoglobin

Explanation

Fetal hemoglobin has a higher affinity for oxygen than adult hemoglobin, which allows it to effectively extract oxygen from the mother's bloodstream in the low oxygen environment of the placenta.

Source

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