The hormone that can replace the process of vernalisation is

Options

A. Cytokinins
B. Gibberellins
C. Auxin
D. Ethylene

Answer

To solve the question regarding the hormone that can replace the process of vernalization, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Vernalization**:
- Vernalization is a process that induces flowering in plants by exposing them to prolonged periods of low temperature. This is crucial for certain plants to transition from vegetative to flowering stages.

**Hint**: Remember that vernalization is linked to temperature and flowering.

2. **Identify the Hormones**:
- The question provides four hormones: Cytokinin, Gibberellin, Auxin, and Ethylene. We need to analyze each hormone's role in plant growth and flowering.

**Hint**: Consider what each hormone primarily regulates in plant physiology.

3. **Analyze Each Hormone**:
- **Cytokinin**: Primarily involved in cell division and delaying senescence (aging) in plants. It does not directly induce flowering.
- **Gibberellin**: Known for promoting stem elongation, seed germination, and flowering. It can effectively replace the need for vernalization in some species by promoting flowering.
- **Auxin**: Responsible for apical dominance and other growth processes, but not specifically for flowering.
- **Ethylene**: Mainly involved in fruit ripening and does not play a significant role in the flowering process.

**Hint**: Focus on which hormone is known for its role in promoting flowering.

4. **Conclusion**:
- Based on the analysis, Gibberellin (often referred to as Gibberellic Acid) is the hormone that can replace the process of vernalization by promoting flowering in plants that require low temperatures to flower.

**Final Answer**: Gibberellin (Gibberellic Acid) is the hormone that can replace the process of vernalization.