Which of the following is not correctly matched?

Options

A. Delay leaf senescene - Cytokinin
B. Induce rooting in a twig - Auxin
C. Induce growth in axillary bud Auxin
D. Quickly ripen a fruit - Ethylene

Answer

To determine which of the following options is not correctly matched, we will analyze each option one by one based on our knowledge of plant hormones and their functions.

### Step-by-Step Solution:

1. **Identify the First Option:**
- **Delay Leaf Senescence - Cytokinin**
- Cytokinins are known to promote cell division and delay leaf senescence. This option is correctly matched.

2. **Identify the Second Option:**
- **Induced Rooting - Auxin**
- Auxins are indeed responsible for promoting root formation. This option is also correctly matched.

3. **Identify the Third Option:**
- **Induced Growth in Auxiliary Bud - Auxin**
- While auxins do play a role in the growth of auxiliary buds, they primarily promote apical dominance, which inhibits the growth of auxiliary buds. Therefore, this option is not correctly matched.

4. **Identify the Fourth Option:**
- **Fruit Ripening - Ethylene**
- Ethylene is a gaseous hormone that is well-known for its role in the ripening of fruits. This option is correctly matched.

5. **Conclusion:**
- Based on the analysis, the third option regarding induced growth in auxiliary buds is not correctly matched with auxin. The correct hormone that promotes growth in auxiliary buds is typically gibberellins, not auxins.

### Final Answer:
The option that is not correctly matched is **Induced Growth in Auxiliary Bud - Auxin**.

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