Formation of archenteron starts in

Options

A. Morula
B. Blastula
C. Early gastrula
D. Early neurula.

Answer

**Step-by-Step Solution:**

1. **Understanding Archenteron**: The archenteron is the early form of the digestive cavity in an embryo. It is crucial for the development of the gut.

2. **Identifying the Stages of Development**: The question provides several stages of embryonic development:
- A. Vorula
- B. Blastula
- C. Early Gastrula
- D. Early Neurula

3. **Recognizing the Formation Process**: The archenteron forms during the gastrulation process, which is characterized by the invagination of the mesoderm and endoderm layers.

4. **Determining the Correct Stage**: Gastrulation leads to the formation of the archenteron, which occurs specifically during the early gastrula stage.

5. **Conclusion**: Based on the understanding of embryonic development stages and the formation of the archenteron, the correct answer is C. Early Gastrula.

**Final Answer**: Option C. Early Gastrula.

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