Cytokinins are formed in

Options

A. Roots
B. Leaves
C. Fruits
D. Stems

Explanation

### Step-by-Step Solution:

1. **Understanding Cytokinins**: Cytokinins are a class of plant hormones that promote cell division and growth in plants. They play a crucial role in various plant developmental processes.

2. **Identifying Locations of Cytokinin Production**: Cytokinins are primarily produced in areas of the plant where rapid cell division occurs. This includes regions such as roots, fruits, and young leaves.

3. **Analyzing the Options**: The question provides four options: roots, leaves, fruits, and stems. We need to determine which of these is the primary site for cytokinin production.

4. **Evaluating Each Option**:
- **Roots**: Cytokinins are indeed produced in roots, but they are not the only site.
- **Leaves**: While leaves can produce cytokinins, they are generally not the primary site for their synthesis.
- **Fruits**: Fruits are known for rapid cell division and growth, making them a significant site for cytokinin production.
- **Stems**: Stems can also produce cytokinins, but like leaves, they are not the main site.

5. **Conclusion**: Given the options and the role of cytokinins in promoting rapid cell division, the best answer is **fruits**. Therefore, cytokinins are formed primarily in **fruits**.

### Final Answer:
Cytokinins are formed in **fruits**.

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