Task: Class Relation Understanding (ontology: Sciences/Biology)

Which of the following classes is one valid superclass of 'basal cell of prostate epithelium'?

A. CD34-positive, CD41-positive, CD42-negative megakaryocyte progenitor cell
B. epithelial cell of prostate
C. B220-positive CD38-positive unswitched memory B cell
D. B220-positive CD38-negative unswitched memory B cell

Answer: epithelial cell of prostate