Zeatin is -

Options

A. auxin
B. GA
C. cytokinin
D. None

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about Zeatin and its classification among plant growth regulators.

2. **Understand Plant Growth Regulators**: Recognize that plant growth regulators, also known as phytohormones, are hormones that regulate various aspects of plant growth and development.

3. **Categorize Plant Hormones**: Plant hormones can be categorized into two main groups based on their activity:
- Plant growth promoters (e.g., auxins, gibberellins, cytokinins)
- Plant growth inhibitors (e.g., abscisic acid)

4. **Focus on Cytokinins**: Zeatin is specifically mentioned in the context of cytokinins. Cytokinins are known to promote cell division and are involved in various growth processes in plants.

5. **Identify Zeatin's Origin**: Zeatin was first isolated from corn kernels and is also found in coconut milk, indicating its natural occurrence in plants.

6. **Select the Correct Option**: Based on the classification and characteristics discussed, it is clear that Zeatin is a type of cytokinin. Therefore, the correct answer to the question is Option 3: Cytokinin.

**Final Answer**: Zeatin is a cytokinin (Option 3).

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