Which one of the following is not correctly matched ?

Options

A. Promote cell division - kinetin
B. Promote senescence - GA
C. Promote floweing - Auxins
D. Promote Abscission - Ethylene

Answer

To solve the question "Which one of the following is not correctly matched?" we will analyze each option provided in the question regarding plant hormones and their functions.

### Step-by-Step Solution:

1. **Identify the Options**: The options provided are:
- Promotes cell division: Chynaetine
- Promotes senescence: Gibberellin (GA)
- Promotes flowering: Auxin
- Promotes abscission: Ethylene

2. **Analyze Each Option**:
- **Promotes Cell Division (Chynaetine)**:
- Chynaetine is a type of cytokinin, which is known to promote cell division. This option is correctly matched.

- **Promotes Senescence (Gibberellin)**:
- Senescence refers to the aging process in plants. Gibberellins (GA) are known to delay senescence, not promote it. This option is **not correctly matched**.

- **Promotes Flowering (Auxin)**:
- Auxins are known to play a role in promoting flowering in certain plants. This option is correctly matched.

- **Promotes Abscission (Ethylene)**:
- Ethylene is a hormone that promotes the process of abscission, which is the shedding of leaves, flowers, or fruits. This option is correctly matched.

3. **Conclusion**: The only option that is not correctly matched is "Promotes senescence: Gibberellin". Therefore, the answer is that Gibberellin does not promote senescence.

### Final Answer:
The correct answer is **Promotes senescence: Gibberellin (GA)** is not correctly matched.

---