Which Two Words are Directional "Opposites

Question

Which two words are directional "opposites"?
A) Proximal, femoral
B) Caudal, cephalic
C) Distal, peripheral
D) Anterior, superficial

Accepted Answer

Caudal and cephalic are directional opposites, referring to the tail end and head end of an organism or structure, respectively. Proximal and distal, while referring to opposite ends of a structure, are not strictly directional opposites. Similarly, while anterior and superficial both refer to positions in relation to the surface of the body, they are not true directional opposites. Peripheral is also not a directional opposite of any of the other terms.