Which Lists the Epithelial Cell Barrier Compartments in the Order

Multiple Choice

Which lists the epithelial cell barrier compartments in the order of the typical Na+ concentrations,from highest to lowest?

A) Intracellular,lumen side,blood side 
B) Blood side,lumen side,intracellular
C) Blood side,intracellular,lumen side
D) Lumen side,intracellular,blood side
E) Lumen side,blood side,intracellular