Question

Acetabulum is a part of
A. Pelvic girdle
B. Pectoral girdle
C. Forearm
D. Upper arm

Answer 1

Hint: A tear in the socket of the 'ball-and-socket' of the hip joint is an acetabular fracture. These hip socket fractures are not common, occurring much less frequently than other fractures of the upper femur or of the femoral head that are part of the ball.

Complete answer: Two coxal bones constitute the pelvic girdle. The fusion of three bones shapes each coxal bone, i.e., every half of the pelvic girdle is made up of ilium, ischium and pubis.
A cavity called the acetabulum is present at the point of fusion of the ilium, ischium and pubis bones to which the thigh bone (femur) articulates. A little over two-fifths of the structure belongs to the ischium. The ilium forms the upper boundary, while the pubis, near the midline, forms the rest. The acetabulum is, therefore, a feature of the pelvic girdle. The group of bones that link arms on either side of our body is the pectoral girdle or shoulder girdle. The bones consisting of the pectoral girdle in humans are of two sizes, but there may be three bones in certain animals. The forearm is a part of the arm between the elbow and the articulation of the radiocarpal. Articulatio radiocarpea, the muscular tissues of the forearm that affect the elbow, are complex and thus the virtual joints are ready in the fascial compartments, very close to those of the muscular tissues of the arm. The shoulder as well as the area between the shoulder and elbow joint form the upper arm. The upper arm bones contain the Scapula. The shoulder blade is sometimes called the scapula. It's a triangle-shaped flat bone often linked by muscle to the body.
Hence, the correct answer is option A.

Note: The upper arm is the main site used to measure blood pressure (BPM); however, the forearm is a commonly used substitute site when the upper arm cannot be used. The study assesses whether there is a large difference in adult BPMs between the upper arm and the forearm and examines the association between the characteristics of the subject and the difference in BPM.