How does the fetal hemoglobin's gamma-globin subunit adapt to the low oxygen environment in the womb?

A It has a higher affinity for oxygen than adult hemoglobin ✓
B It has a lower affinity for oxygen than adult hemoglobin
C It is more susceptible to oxidation than adult hemoglobin
D It is less efficient at transporting carbon dioxide than adult hemoglobin

Explanation

Fetal hemoglobin's gamma-globin subunit has a higher affinity for oxygen than adult hemoglobin, allowing it to effectively extract oxygen from the mother's bloodstream in the low oxygen environment of the womb.

Source

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