Final answer:
Each hip bone is made up of three fused sections: ilium, ischium, and pubis, with ilium forming the superior part.
Step-by-step explanation:
Each hip bone, or os coxae, is composed of three sections that fuse together. These sections are the ilium, ischium, and pubis. Together, they form the adult os coxae, contributing to the structure of the pelvic girdle, which is key for attaching the lower limbs to the axial skeleton and providing support for bodily movements. Therefore, the correct answer is B) Three.
As for the superior part of the hip bone, it is formed by the ilium, which makes option a. the correct answer to the second question provided.