The inner layer of the human eyeball includes the:

Options

A. lens and choroid
B. retina
C. sclera and cornea
D. both (a) and (c)

Explanation

To answer the question about the inner layer of the human eyeball, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Layers of the Eyeball**:
- The human eyeball consists of three main layers: the outer layer, the middle layer, and the inner layer.

2. **Define Each Layer**:
- **Outer Layer**: This includes the sclera and cornea.
- **Middle Layer**: This consists of the choroid, ciliary body, and iris.
- **Inner Layer**: This is primarily composed of the retina.

3. **Focus on the Inner Layer**:
- The question specifically asks about the inner layer of the eyeball. From our definitions, we see that the inner layer is the retina.

4. **Evaluate the Options**:
- The options provided in the question include "lens and choroid," "retina," "sclera," and "cornea."
- Based on our understanding, the lens is not part of the inner layer; it is a separate structure. The choroid is part of the middle layer, while the sclera and cornea are part of the outer layer.

5. **Conclusion**:
- Therefore, the correct answer to the question is that the inner layer of the human eyeball includes the **retina**.

### Final Answer:
The inner layer of the human eyeball includes the **retina**.

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