Seedless fruits can be induced by

Options

A. ABA and IAA
B. ABA and Zeatin
C. IAA and `GA_(3)`
D. Ethylene and ABA.

Answer

### Step-by-Step Solution:

1. **Understand the Concept of Seedless Fruits**: Seedless fruits can be produced without the fertilization of ovules, a process known as parthenocarpy.

2. **Identify the Hormones Involved**: The main hormones that induce parthenocarpy are auxins and gibberellins. Specifically, Indole-3-acetic acid (IAA) and Gibberellic acid (GA3) are the two key hormones that can be used to induce seedless fruit development.

3. **Mechanism of Action**: When unfertilized flowers are treated with these hormones, they can reach a threshold concentration that triggers the development of fruit without fertilization. This results in the formation of seedless fruits.

4. **Examples of Seedless Fruits**: Grapes are a common example of seedless fruits that can be produced through this method.

5. **Exclusion of Other Hormones**: Other hormones like abscisic acid (ABA) and ethylene do not induce seedless fruit formation. ABA is involved in processes like seed and bud dormancy, while ethylene is a gas that influences various aspects of plant growth but does not promote parthenocarpy.

6. **Conclusion**: Therefore, the correct answer to the question "Seedless fruits can be induced by" is the application of IAA and GA3.