Hormone group responsible for breaking see dormancy 1. ABA 2. Cytokinin 3. Auxin 4. Gibberellin

Options

A. a , c
B. a , b , c
C. b, c, d
D. a , b , d

Answer

To determine which hormone group is responsible for breaking seed dormancy, we can analyze each of the given options: ABA (Abscisic Acid), Cytokinin, Auxin, and Gibberellin.

### Step-by-Step Solution:

1. **Understand Abscisic Acid (ABA)**:
- Abscisic Acid is known as an inhibitor hormone. It promotes seed dormancy and inhibits growth. Therefore, it is not responsible for breaking seed dormancy.
- **Conclusion**: ABA promotes seed dormancy.

2. **Understand Cytokinin**:
- Cytokinins are hormones that promote cell division and growth in plants. They are known to inhibit seed dormancy, thus promoting growth.
- **Conclusion**: Cytokinin helps in breaking seed dormancy.

3. **Understand Auxin**:
- Auxins are another group of hormones that promote plant growth. They also inhibit seed dormancy, encouraging the seeds to germinate.
- **Conclusion**: Auxin helps in breaking seed dormancy.

4. **Understand Gibberellin**:
- Gibberellins are growth hormones that promote various developmental processes in plants, including seed germination. They also inhibit seed dormancy.
- **Conclusion**: Gibberellin helps in breaking seed dormancy.

5. **Final Evaluation**:
- From the analysis, we see that Cytokinin, Auxin, and Gibberellin all play a role in breaking seed dormancy, while Abscisic Acid promotes it.
- Therefore, the correct answer to the question is **Cytokinin, Auxin, and Gibberellin**.

### Final Answer:
The hormone group responsible for breaking seed dormancy is **Cytokinin, Auxin, and Gibberellin**.