Parthenocarpy can be achieved by

Options

A. Zeatin
B. ABA
C. Auxins
D. Kinetin.

Answer

### Step-by-Step Solution:

1. **Understanding Parthenocarpy**:
- Parthenocarpy refers to the development of fruit without fertilization. This means that the fruit can develop without the seeds being formed through the usual fertilization process.

2. **Identifying Phytohormones**:
- The question provides several options: Zeatin, ABA (Abscisic Acid), Auxins, and Kinetin. We need to determine which of these hormones can promote parthenocarpy.

3. **Role of Auxins**:
- Auxins are a class of plant hormones that play a crucial role in the growth and development of plants. They are known to promote the enlargement of the ovary, leading to fruit development.

4. **Application of Auxins in Parthenocarpy**:
- When auxins are applied to flowers that have not undergone fertilization, they stimulate the ovary to enlarge and develop into a fruit. This results in the formation of seedless fruits, as there are no seeds produced due to the lack of fertilization.

5. **Example of Parthenocarpy**:
- A common example of parthenocarpy is the production of seedless tomatoes, which are cultivated using the application of auxins.

6. **Conclusion**:
- Based on the information provided, the correct answer to the question "Parthenocarpy can be achieved by" is **Auxins (Option C)**.