The allantois has the similar layers as present in the yolk sac. These are

Options

A. Outer mesoderm and inner endoderm
B. Outer endoderm and inner mesoderm
C. Outer endoderm and inner ectoderm
D. Outer endoderm and inner endoderm

Explanation

To answer the question regarding the layers present in the allantois that are similar to those in the yolk sac, we can break down the solution step by step.

### Step-by-Step Solution:

1. **Understanding the Allantois and Yolk Sac**:
- The allantois and yolk sac are both extraembryonic membranes involved in the development of the embryo.
- They play crucial roles in nutrient transfer and waste management.

2. **Identifying the Layers**:
- The allantois consists of two main layers:
- **Outer Layer**: Mesoderm
- **Inner Layer**: Endoderm
- Similarly, the yolk sac also has the same configuration of layers:
- **Outer Layer**: Mesoderm
- **Inner Layer**: Endoderm

3. **Conclusion**:
- Therefore, the layers present in both the allantois and the yolk sac are:
- **Outer Mesoderm and Inner Endoderm**.

### Final Answer:
The allantois has the same layers as the yolk sac, which are the **Outer Mesoderm and Inner Endoderm**.

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