The bones that comprise the hip are

• A. Femur
• B. Ilium, Ischium, Pubis
• C. Radius, Ulna
• D. Sacrum

Answer: (B)

The hip bone is made up of three bones that fuse together: the ilium, the ischium, and the pubis. In development these parts start separate and later join to form the single hip bone on each side, with the acetabulum—the socket for the femoral head—created by their combined rims. The other options don’t fit because the femur is the thigh bone that connects to the hip, the radius and ulna are forearm bones, and the sacrum is part of the pelvis but not one of the hip bones themselves.