Hormone involved in the formation of winter buds

Options

A. GA
B. CK
C. ABA
D. Ethylene.

Answer

### Step-by-Step Solution:

1. **Understanding Winter Buds**:
- Winter buds are dormant, condensed shoots of woody plants. They are protected by a covering that helps the plant survive harsh winter conditions.

2. **Identifying the Hormones**:
- The question provides four options:
- A) Gibberellic acid
- B) Cytokinins
- C) Abscisic acid (ABA)
- D) Ethylene

3. **Function of Abscisic Acid (ABA)**:
- Abscisic acid is a plant hormone that plays a crucial role in plant responses to stress and dormancy. It is involved in the formation of winter buds by promoting the transition of the apical meristem into a dormant state.

4. **Conclusion**:
- Based on the information, the hormone involved in the formation of winter buds is **Abscisic Acid (ABA)**.

### Final Answer:
The hormone involved in the formation of winter buds is **Abscisic Acid (ABA)**.

---