Upon fertilization, what structure develops from carpel?

Options

A. testa
B. tegmen
C. pericarp
D. perisperm

Explanation

To answer the question "Upon fertilization, what structure develops from carpel?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Carpel**: The carpel is the female reproductive part of a flower, consisting of the ovary, style, and stigma. The ovary contains ovules, which develop into seeds after fertilization.

2. **Process of Fertilization**: During fertilization, pollen grains land on the stigma, and the sperm cells travel down the style to fertilize the ovules in the ovary.

3. **Development Post-Fertilization**: After fertilization occurs, the fertilized ovules develop into seeds. Simultaneously, the ovary wall begins to transform.

4. **Formation of the Fruit**: The ovary wall develops into a structure known as the pericarp, which is the fleshy part of the fruit that surrounds the seeds. This transformation is crucial for the protection and dispersal of the seeds.

5. **Conclusion**: Therefore, the structure that develops from the carpel upon fertilization is the pericarp, which is part of the fruit.

### Final Answer:
The structure that develops from the carpel upon fertilization is the **pericarp** (Option C).

---