In a man, abducens nerve is injured. Which one of the following functions will be affected ?

Options

A. Movement of the eye ball
B. Swallowing
C. Movement of the tongue
D. Movement of the neck

Answer

### Step-by-Step Solution:

1. **Identify the Nerve**: The question refers to the abducens nerve, which is one of the cranial nerves in humans.

2. **Cranial Nerve Classification**: The abducens nerve is the sixth cranial nerve and is classified as a motor nerve. Motor nerves are responsible for controlling the movement of muscles.

3. **Function of the Abducens Nerve**: The primary function of the abducens nerve is to control the lateral rectus muscle of the eye, which is responsible for the movement of the eyeball laterally (away from the midline).

4. **Analyzing the Options**:
- **Movement of Eyeball**: This is directly controlled by the abducens nerve.
- **Swallowing**: This function is primarily associated with other cranial nerves, not the abducens.
- **Movement of Tongue**: This is controlled by the hypoglossal nerve, not the abducens.
- **Movement of the Neck**: This is associated with the accessory nerve, not the abducens.

5. **Conclusion**: Since the abducens nerve is responsible for the movement of the eyeball, if it is injured, the function that will be affected is the movement of the eyeball.

### Final Answer:
The function that will be affected is the **movement of the eyeball**.

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