Which of the Following is Not One of the Bones

Question

Which of the following is not one of the bones that makes up the hip bone?
A) ilium
B) acetabulum
C) ischium
D) pubis

Accepted Answer

The acetabulum is not a bone, but rather a concave surface formed by the fusion of the ilium, ischium, and pubis that articulates with the head of the femur to form the hip joint.