Question

the ilium, ischium, and pubis fuse into a single bone called the
coxal bone.
pelvic girdle.
coccyx.
pectoral girdle.
patella.

Explanation:

The ilium, ischium, and pubis fuse to form the coxal bone, also known as the hip - bone. The pelvic girdle is composed of two coxal bones. The coccyx is the tail - bone. The pectoral girdle is related to the shoulder. The patella is the kneecap.

Answer:

A. coxal bone