What is the primary function of the blood component that expresses CD34, a marker for hematopoietic stem cells?

A To produce antibodies against pathogens
B To differentiate into all blood cell types ✓
C To regulate blood coagulation
D To remove waste products from the blood

Explanation

CD34 is a marker for hematopoietic stem cells, which have the ability to differentiate into all blood cell types.

Source

Robbins and Cotran's Pathologic Basis of Disease
Hematology Hematology: Blood Components Hematology: Blood Components Medium MEDICAL Confidence: high