In the diagram below, line AD is perpendicular to ray FC.

A diagram of intersecting lines and rays.

Which pair is complementary?

f ∠AFB and ∠EFA
g ∠AFB and ∠BFD
h ∠AFB and ∠BFC
j ∠BFC and ∠CFD

h. ∠AFB and ∠BFC are complementary angles.