Apical dominance can be overcome by application of :

Options

A. GA
B. Cytokinin
C. Ethylene
D. Auxin

Answer

To solve the question regarding the overcoming of apical dominance, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Apical Dominance**:
- Apical dominance is a phenomenon in plants where the main central stem grows more vigorously than the side stems (lateral branches). This is primarily due to the influence of the apical bud, which produces hormones that inhibit the growth of lateral buds.

2. **Identifying the Hormones Involved**:
- The primary hormone responsible for apical dominance is **auxin**. Auxin promotes the growth of the main shoot and inhibits the growth of lateral buds.

3. **Recognizing the Need to Overcome Apical Dominance**:
- To promote the growth of lateral buds (lateral dominance), we need to apply a substance that can counteract the effects of auxin.

4. **Evaluating the Options**:
- **Option A: Gibberellin (GA)** - This hormone promotes stem elongation but does not specifically overcome apical dominance.
- **Option B: Cytokinin** - This hormone promotes cell division and can stimulate the growth of lateral buds, effectively overcoming apical dominance.
- **Option C: Ethylene** - This is a gaseous hormone that acts as a negative regulator and does not promote lateral bud growth.
- **Option D: Auxin** - This hormone promotes apical dominance and would not help in overcoming it.

5. **Conclusion**:
- Based on the evaluation of the options, the hormone that can effectively overcome apical dominance is **cytokinin**.

### Final Answer:
The correct answer is **Option B: Cytokinin**.

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