Movement into and out of cells — practice question

Which row correctly gives all the possible relationships between the concentrations of a substance when it is transported by endocytosis or exocytosis?

• Aendocytosis: concentrations equal; exocytosis: concentrations equal
• Bendocytosis: concentrations equal, greater inside or greater outside; exocytosis: concentrations equal, greater inside or greater outside
• Cendocytosis: concentrations equal or greater outside; exocytosis: concentrations equal or lower outside
• Dendocytosis: concentrations equal or lower outside; exocytosis: concentrations equal or greater outside