Internodal elongation is associated with:

Options

A. Auxin
B. Cytokinin
C. Gibberellin
D. ABA

Answer

**Step-by-Step Solution:**

1. **Understanding Internodal Elongation**: Internodal elongation refers to the increase in length of the internodes, which are the segments of the stem between two nodes. This process is crucial for the overall growth of the plant.

2. **Identifying Plant Hormones**: Various plant hormones are involved in the growth processes of plants. The question asks which hormone is specifically associated with internodal elongation.

3. **Evaluating the Options**:
- **Option A: Auxin**: Auxins are known to promote stem elongation, but they primarily affect the growth at the tips (apical growth) rather than specifically promoting internodal elongation.
- **Option B: Cytokinin**: Cytokinins promote cell division and are involved in the growth of lateral buds, but they do not directly facilitate internodal elongation.
- **Option C: Gibberellin**: Gibberellins are plant hormones that play a significant role in promoting internodal elongation. They stimulate cell division and elongation in the internodes, leading to increased stem length.
- **Option D: Abscisic Acid**: Abscisic acid is primarily involved in stress responses, such as closing stomata to prevent water loss, and does not promote internodal elongation.

4. **Conclusion**: Based on the evaluation of the options, the hormone that is specifically associated with internodal elongation is **Gibberellin**.

**Final Answer**: Gibberellin (Option C) is associated with internodal elongation.

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