Indicate the correct match in the following

Options

A. II cranial nerve - vagus
B. V cranial nerve - heart
C. VIII cranial nerve - lower jaw muscle
D. VI cranial nerve - external rectus muscle of eye

Answer

To solve the question regarding the correct match of cranial nerves, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Cranial Nerves**:
- There are 12 cranial nerves, each with specific functions. We need to know the correct name and function of each nerve.

2. **List the Cranial Nerves and Their Functions**:
- **I. Olfactory Nerve**: Sense of smell.
- **II. Optic Nerve**: Vision.
- **III. Oculomotor Nerve**: Eye movement (controls most eye muscles).
- **IV. Trochlear Nerve**: Eye movement (specifically the superior oblique muscle).
- **V. Trigeminal Nerve**: Sensory and motor functions (facial sensation and chewing).
- **VI. Abducens Nerve**: Eye movement (specifically the lateral rectus muscle).
- **VII. Facial Nerve**: Motor and sensory functions (facial expressions and taste).
- **VIII. Vestibulocochlear Nerve**: Hearing and balance.
- **IX. Glossopharyngeal Nerve**: Motor and sensory functions (taste and swallowing).
- **X. Vagus Nerve**: Motor, sensory, and parasympathetic functions.
- **XI. Accessory Nerve**: Motor function (shoulder and neck muscles).
- **XII. Hypoglossal Nerve**: Motor function (tongue muscles).

3. **Analyze the Options**:
- **Option 1**: Second cranial nerve is vagus. (Incorrect - it is the optic nerve)
- **Option 2**: Fifth cranial nerve is for hearts. (Incorrect - it is the trigeminal nerve)
- **Option 3**: Eighth cranial nerve is for lower jaws. (Incorrect - it is the vestibulocochlear nerve)
- **Option 4**: Sixth cranial nerve is for external rectus muscle of the eye. (Correct - it is the abducens nerve)

4. **Select the Correct Option**:
- The correct match is found in **Option 4**, which states that the sixth cranial nerve (abducens nerve) is responsible for the lateral rectus muscle, allowing outward gaze.

### Final Answer:
The correct match is **Option 4**: The sixth cranial nerve is the abducens nerve, which helps control the lateral rectus muscle of the eye.

---