The eye rotates in the orbit by
(a) Four rectus and two oblique muscles
(b) Ciliary muscles
(c) Suspensory ligaments and ciliary muscles
(d) Three circular and four ob lique muscles

Options

A. Four rectus and two oblique muscles
B. Ciliary muscles
C. Suspensory ligaments and ciliary muscles
D. Three circular and four ob lique muscles.

Answer

To solve the question about which muscles are responsible for the rotation of the eye in the orbit, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks which muscles enable the rotation of the eye within the eye socket (orbit).

2. **Identify the Muscles Involved**: The eye is controlled by six extraocular muscles. These muscles are responsible for the movement and rotation of the eye.

3. **Categorize the Muscles**: Among the six extraocular muscles, there are:
- **Four Rectus Muscles**: These are the superior rectus, inferior rectus, lateral rectus, and medial rectus muscles. They control movements in the up, down, left, and right directions.
- **Two Oblique Muscles**: These are the superior oblique and inferior oblique muscles. They help in adjusting the eye's position and movement.

4. **Evaluate the Options**:
- **Option (a)**: Four rectus and two oblique muscles - This is correct because it accurately describes the six muscles involved in eye rotation.
- **Option (b)**: Ciliary muscles - Incorrect, as these muscles are involved in adjusting the lens for focus, not eye rotation.
- **Option (c)**: Suspensory ligaments and ciliary muscles - Incorrect, as these do not contribute to eye rotation.
- **Option (d)**: Three circular and four oblique muscles - Incorrect, as there are no circular muscles involved in eye rotation.

5. **Conclusion**: The correct answer is option (a) - Four rectus and two oblique muscles.

### Final Answer:
(a) Four rectus and two oblique muscles