Assertion (A): Radius and ulna are the two long bones of the lower arm.

Reason (R): Tibia and fibula are the two long bones of the shank.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Assertion (A): Sternum is a large bone formed by the fusion of five vertebrae. It is found between the lumbar vertebrae and соссух.

Reason (R): Sternum lies in the middle of the front part of the chest.

1. A is True and R is False.
2. A is False and R is True.
3. Both A and R are True.
4. Both A and R are False.

Name any two parts of your body where the supporting skeleton is made of cartilage instead of bone.

Name:

(a) Three main constituents of the human skeleton.

(b) Two main divisions of the human skeleton.

(c) Four parts of Axial skeleton.

(d) Five regions of vertebral column.

(e) Four kinds of freely movable joints.