Lens of eyes is derived from

Options

A. Ectoderm
B. Mesoderm
C. Endoderm
D. Both (mesoderm) and (endoderm)

Answer

To solve the question "Lens of eyes is derived from," we need to identify the correct germ layer from which the lens of the eye originates. Let's analyze the options step by step.

### Step-by-Step Solution:

1. **Understanding Germ Layers**:
- In embryonic development, there are three primary germ layers: ectoderm, mesoderm, and endoderm. Each layer gives rise to different tissues and organs in the body.

2. **Option 1: Ectoderm**:
- The ectoderm is the outermost germ layer. It is responsible for forming structures such as the skin, hair, nails, and the nervous system. Importantly, the lens of the eye also develops from the ectoderm.
- **Conclusion**: This option is correct.

3. **Option 2: Mesoderm**:
- The mesoderm is the middle germ layer. It primarily gives rise to muscles, bones, the circulatory system, and other internal structures. The lens of the eye does not develop from this layer.
- **Conclusion**: This option is incorrect.

4. **Option 3: Endoderm**:
- The endoderm is the innermost germ layer. It forms the lining of the gut and other internal organs. The lens of the eye does not originate from the endoderm.
- **Conclusion**: This option is incorrect.

5. **Option 4: Both Mesoderm and Endoderm**:
- Since both mesoderm and endoderm do not contribute to the formation of the lens, this option is also incorrect.
- **Conclusion**: This option is incorrect.

### Final Answer:
The lens of the eye is derived from the **ectoderm**.