What is the primary function of the enzyme methemoglobin reductase in red blood cells?

A To convert methemoglobin to hemoglobin ✓
B To convert hemoglobin to methemoglobin
C To reduce oxidative stress in red blood cells
D To increase the production of 2,3-Bisphosphoglycerate

Explanation

Methemoglobin reductase is an enzyme that converts methemoglobin (a form of hemoglobin that cannot bind oxygen) back to normal hemoglobin, allowing it to bind oxygen again.

Source

Guyton and Hall Textbook of Medical Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Medium MEDICAL Confidence: high