The affect of apical dominance can be overcome by which of the following hormone

Explanation

**Step-by-Step Solution:**

1. **Understanding Apical Dominance:**
- Apical dominance is a phenomenon where the main central stem of the plant grows more strongly than the other side stems. This is primarily regulated by plant hormones.

2. **Identifying Key Hormones:**
- The main hormones involved in apical dominance are auxins (like IAA) and cytokinins. Auxins promote apical dominance, while cytokinins can counteract this effect.

3. **Role of Auxins:**
- Auxins, particularly Indole-3-acetic acid (IAA), are responsible for promoting the growth of the apical bud, thus enhancing apical dominance.

4. **Role of Cytokinins:**
- Cytokinins are plant hormones that promote cell division and can stimulate the growth of lateral buds, thereby overcoming apical dominance.

5. **Conclusion:**
- Based on the antagonistic relationship between cytokinins and auxins, the hormone that can overcome the effect of apical dominance is **cytokinin**.

**Final Answer: Cytokinin**

---