Which of the following prevents falling of fruits
OR
Fruit and leaf drop at early stages can be prevented by the application

Options

A. Cytokinins
B. Ethylene
C. Auxin
D. Gibberellic acid

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks which hormone prevents the falling of fruits or can prevent fruit and leaf drop at early stages.

2. **Identifying Relevant Hormones**: In plant biology, various hormones play roles in growth and development, but we need to focus on those specifically involved in preventing fruit drop.

3. **Recognizing the Role of Auxins**: Auxins are a class of plant hormones that are known to regulate various aspects of plant growth, including the prevention of premature fruit drop.

4. **Examples of Auxins**:
- **2,4-Dichlorophenoxyacetic acid (2,4-D)**: This auxin is used in low concentrations to prevent fruit drop in crops like oranges and apples.
- **Naphthalene acetic acid (NAA)**: Another auxin that helps in preventing fruit drop, particularly in tomatoes.

5. **Conclusion**: Based on the information, the hormone responsible for preventing the falling of fruits is **Auxin**. Therefore, the correct answer is option number 3.