Collar bone is known as:
A) scapula
B) clavicle
C) pelvic girdle
D) chevron bone

Hint:The Collarbone is a long bone that serves as a strut between the shoulder blade and the sternum or breastbone.

Complete answer:
1) The scapula is also known as the shoulder bone, shoulder blade, wing bone or blade bone. It is the bone that connects the humerus (upper arm bone) with the clavicle (collar bone).
2) The collar bone, alternatively known as the clavicle, is a pair of two bones on the upper chest of the body.There are two collar bones in the body, one on the left and one on the right. The collarbone/clavicle is the only long bone in the body that lies horizontally. It makes up the shoulder girdle together with the shoulder blade. It creates a bulge in the skin. It is the most commonly fractured bone. It can easily be fractured due to impacts to the shoulder from the force of falling on outstretched arms or by a direct hit on the bone itself.
3) The pelvic girdle is a structure on the abdomen of the body. It is composed of the appendicular hip bones (individually known as ilium, ischium, and pubis) oriented in the shape of a ring. It connects the pelvic region of the spine to the lower limbs.
4) The chevron bone is one of a pair of bones which form a sub-vertebral V-shaped arch beneath the spinal column of many animals including many reptiles, dinosaurs, and some mammals such as kangaroos and manatees. It forms the arch especially in the caudal region.

Thus, the correct answer is option B (clavicle).

Note:The clavicle fracture is a break in the bone connecting the breastbone and shoulder. It can result in swelling and increased pain when moving the shoulder.