Fruit and leaf drop at early states can be prevented by the application of ::

Options

A. 1)Cytokinins
B. 2)Ethylene
C. 3)Auxins
D. 4)Gibberellic acid

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which plant hormone can prevent the early drop of fruits and leaves.

2. **Analyzing the Options**:
- **Option 1: Cytokinin**: This hormone promotes cell division and differentiation but does not specifically prevent leaf and fruit drop. Therefore, this option is incorrect.

- **Option 2: Ethylene**: Ethylene is known to regulate growth and senescence. It can promote the dropping of fruits and leaves rather than prevent it. Hence, this option is also incorrect.

- **Option 3: Auxin**: Auxin is produced in the growing tips of stems and roots. It promotes cell division and differentiation and is known to prevent the dropping of leaves and fruits at early stages. This makes this option correct.

- **Option 4: Gibberellic Acid**: This hormone stimulates cell division and is used in the manipulation of flowering and fruit development. However, it does not specifically prevent leaf and fruit drop, making this option incorrect.

3. **Conclusion**: After analyzing all the options, the correct answer is **Auxin** (Option 3), as it is the hormone that prevents the early drop of fruits and leaves.

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