Final answer:
The superiormost margin of the coxal bone is the iliac crest, which is the curved, superior margin of the ilium. This anatomical landmark serves as an important attachment point for muscles.
Step-by-step explanation:
The superiormost margin of the coxal bone is the iliac crest. This is the curved, superior margin of the ilium and can be felt when you place your hands on your waist. The iliac crest serves as an important anatomical landmark and as an attachment point for muscles of the thigh and torso.
The hip bone is comprised of three main regions: the ilium, ischium, and pubis. The ischial tuberosity supports body weight while sitting; however, it does not form the superior part of the hip bone. The pubic symphysis and acetabulum are also components of the hip bone but do not make up the superior aspect. Thus, the correct answer to the question, 'What is the superiormost margin of the coxal bone?' is D) Iliac crest.