Which of the following body parts has a hinge joint?
A.Shoulder
B.Ribcage
C.Knee
D.None of the above

Hint: Hinge joint is a type of joint which allows the movement only in one plane which can also be classified as a uniaxial joint. These joints allow for straightening, flexing, and bending of joints in the body. It is known as the joint of flexion and bending.

Complete step by step answer:Option -A- Shoulder
No shoulder joint does not come under the hinge joint. The shoulder joint is a type of ball and socket joint. It is also a synovial joint and also known as the glenohumeral joint. It is a joint connecting shoulder or shoulder girdle with the trunk. It is one of the major moving joints of the body with great stability.
Option -B- Ribcage
It is also not a hinge joint. The type of joint present in ribs is a costochondral joint. It is also known as a hyaline cartilaginous joint. It is a type of articulation between each rib in a ribcage and their hyaline cartilage.
Option -C- Knee
The knee joint is the most important and classical example of a hinge joint. It is the largest known joint of the body. Though it is a hinge joint it has a quite different structure from other hinge joints of the body which are the ankle joint, elbow joint, joints of the foot and hands. Besides the flexion-extension of the joint, they also allow side to side movement in it. This is the most important hinge joint in the body.
Option -D- None of the above
This option as such does not need any explanation as it is saying that none of the above-mentioned options is the example of the hinge joint.
So, the correct answer to this question is the option"C" knee joint.

Note:Synovial joints are the joints in the body that are found between two bones or the articulating surfaces in the body that allows some degree of movements in the body. Hinge joints along with many other types of joints are examples of the synovial joints which are responsible for the movements of the body.