Final answer:
The cup-like socket for the head of the femur (thigh bone) is called the acetabulum. hence option A is correct.
Step-by-step explanation:
The acetabulum is a component of the hip bone, which is formed by the fusion of three bones: the ilium, the ischium, and the pubis. Together, these three bones make up each coxal bone, also known as the hip bone or pelvic bone. Here's a brief description of each component:
Ilium: The large, fan-shaped bone forming the upper part of each coxal bone.
Ischium: The "sit bone" that forms the lower and posterior part of the coxal bone. It contains the ischial tuberosity, the bony prominence we sit on.
Pubis: The anterior part of the coxal bone that joins the ischium at the pubic symphysis.
The acetabulum is formed at the junction of these three bones and serves as the socket for articulation with the head of the femur, forming the hip joint. The structure and stability of the acetabulum are crucial for proper hip function and movement. hence option A is correct.