The hinge joint allows movement in

Options

A. all directions
B. one plane only
C. two planes only
D. depends on where the joint is located in the body.

Explanation

### Step-by-Step Solution:

1. **Understanding the Hinge Joint**: The hinge joint is a type of joint in the body that allows movement similar to the way a door opens and closes. It is important to recognize that this joint permits movement in only one direction.

2. **Identifying Examples of Hinge Joints**: Common examples of hinge joints in the human body include the knee joint and the elbow joint. These joints allow bending and straightening, which is a one-sided movement.

3. **Movement Direction**: Since the hinge joint allows movement in only one direction, we can conclude that it operates in a single plane. This means that the movement is limited to flexion (bending) and extension (straightening).

4. **Eliminating Other Options**:
- The option stating "All Direction" refers to ball and socket joints, which allow movement in multiple directions. Therefore, this option is incorrect for hinge joints.
- The option mentioning "Two Planes" refers to pivot joints, which allow rotation and movement in two different planes. This is also not applicable to hinge joints.
- The option that states "Depends on where the joint is located" is too vague and does not specifically address the nature of hinge joints.

5. **Final Conclusion**: Based on the analysis, the correct answer to the question "The hinge joint allows movement in" is "only one plane."