2, 4-D is a synthetic

Options

A. Auxin
B. Gibberellin
C. Cytokinin
D. Florigen

Answer

**Step-by-Step Solution:**

1. **Identify the Options**: The question provides four options: auxin, gibberellin, cytokinin, and fluorigen.

2. **Understand the Definition of Auxins**: Auxins are plant hormones that play a crucial role in regulating plant growth and development. They are involved in various processes such as cell elongation, apical dominance, and root formation.

3. **Differentiate Between Natural and Synthetic Auxins**: Auxins can be classified into natural and synthetic. Natural auxins include substances like Indole-3-acetic acid (IAA), while synthetic auxins are chemically manufactured to mimic the effects of natural auxins.

4. **Identify 2,4-D**: The compound 2,4-D stands for 2,4-dichlorophenoxyacetic acid. It is a synthetic auxin that is widely used in agriculture as a herbicide.

5. **Conclusion**: Since 2,4-D is a synthetic compound that mimics the action of natural auxins, it is classified as a synthetic auxin.

6. **Final Answer**: Therefore, the correct answer to the question is that 2,4-D is a synthetic auxin.

---