Which of the Following Statements About the Structure of the Fish

Which of the following statements about the structure of the fish gill is false?

A) Afferent vessels bring blood to the gills, whereas efferent vessels take blood away from the gills.
B) Exchange of respiratory gases occurs within the lamellae of the gill filaments.
C) The efferent and afferent vessels are the counter-current flow system of the gill.
D) The lamellae greatly increase the surface area for gas exchange.
E) The opercular flaps enclose the gill chambers.