Describe Hemoglobin

Describe hemoglobin.

A) Hemoglobin is a protein inside platelets that when activated makes them sticky.
B) Hemoglobin is a lysosomal enzyme inside white blood cells that digests pathogens after phagocytosis.
C) Hemoglobin is a protein inside RBCs that helps maintain their flexibility.
D) Hemoglobin is a protein inside RBCs that binds oxygen.
E) Hemoglobin is an enzyme inside RBCs that converts carbon dioxide to carbonic acid.