Parthenocarpic fruits cannot be produced by application of

Options

A. IAA
B. 2, 4-D
C. ABA
D. IBA.

Answer

### Step-by-Step Solution:

1. **Understanding Parthenocarpy**:
- Parthenocarpy is the process of producing seedless fruits without fertilization. This means that the fruit develops without the need for seeds to be formed.

2. **Examples of Parthenocarpic Fruits**:
- Common examples include bananas, pineapples, cucumbers, tomatoes, grapes, oranges, and kiwis. These fruits can develop without fertilization.

3. **Hormones Inducing Parthenocarpy**:
- Parthenocarpy can be induced by certain plant hormones known as auxins. The specific auxins that promote this process include:
- IAA (Indole-3-acetic acid)
- IBA (Indole-3-butyric acid)
- 2,4-D (2,4-Dichlorophenoxyacetic acid)

4. **Identifying the Non-Inducing Hormone**:
- The question asks which hormone cannot produce parthenocarpic fruits. Among the options provided:
- IAA, 2,4-D, and IBA are all auxins and can induce parthenocarpy.
- ABA (Abscisic acid) is the hormone that does not induce parthenocarpy. Instead, ABA is known as a stress hormone that can cause dormancy in buds and inhibit fruit development.

5. **Conclusion**:
- Therefore, the hormone that cannot produce parthenocarpic fruits is ABA (Abscisic acid).

### Final Answer:
Parthenocarpic fruits cannot be produced by the application of **ABA (Abscisic acid)**.

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