What is the primary mechanism by which hemoglobin protects against oxidative stress?

A By binding to antioxidant enzymes
B By scavenging free radicals
C By releasing heme oxygenase-1
D By forming methemoglobin
Hemoglobin has antioxidant properties that help protect against oxidative stress by scavenging free radicals.
Biochemistry textbooks
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Medium MEDICAL Confidence: high