Which of These Is FALSE Regarding Sesamoid Bones

Which of these is FALSE regarding sesamoid bones?

A) Sesamoid bones develop in particular tendons where there is friction and tension.
B) Sesamoid bones can change the direction the tendon pulls to increase the mechanical advantage at the joint.
C) The elbow and knee are the only locations where sesamoid bones develop.
D) Sesamoid bones vary in number from person to person.
E) The two largest sesamoid bones are the patellae; most of the sesamoid bones are only millimeters in diameter.