Cytokinis are mostly

Options

A. glucosides
B. phenolics
C. amino purines
D. organic acids

Explanation

To answer the question "Cytokinins are mostly," we can follow these steps:

### Step-by-Step Solution:

1. **Identify what Cytokinins are**: Cytokinins are a class of plant hormones that play a crucial role in promoting cell division and growth in plants.

2. **Determine the chemical nature of Cytokinins**: Cytokinins are primarily classified as basic compounds. They are derivatives of purines, specifically aminopurines.

3. **Recognize the types of Cytokinins**: The first cytokinin discovered was kinetin, which is an aminopurine derivative. Another important cytokinin is zeatin, which is an adenine derivative. However, aside from zeatin, all other naturally occurring cytokinins are aminopurine derivatives.

4. **Analyze the options provided**: The options given include glucosides, phenolics, aminopurines, and organic acids. Based on the information gathered:
- Glucosides: Incorrect
- Phenolics: Incorrect
- Aminopurines: Correct
- Organic acids: Incorrect

5. **Conclude the answer**: Therefore, the correct answer is that cytokinins are mostly aminopurines.

### Final Answer:
Cytokinins are mostly aminopurines.

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