One of the synthetic auxin is

Options

A. GA
B. IBA
C. NAA
D. IAA

Answer

To answer the question "One of the synthetic auxins is," we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Auxins**: Auxins are a class of plant hormones that play a crucial role in the growth and development of plants. They are primarily involved in processes like cell elongation, root formation, and fruit development.

2. **Natural vs. Synthetic Auxins**: Auxins can be classified into natural and synthetic types. Natural auxins are produced by plants, while synthetic auxins are artificially created for agricultural use.

3. **Identifying Natural Auxins**: The most common natural auxins include:
- Indole-3-acetic acid (IAA)
- Indole-3-butyric acid (IBA)

4. **Identifying Synthetic Auxins**: Synthetic auxins are developed for various agricultural applications, particularly as herbicides. Two well-known synthetic auxins are:
- Naphthalene acetic acid (NAA)
- 2,4-Dichlorophenoxyacetic acid (2,4-D)

5. **Conclusion**: Based on the information provided, one of the synthetic auxins is NAA (naphthalene acetic acid). Another example is 2,4-D (2,4-Dichlorophenoxyacetic acid).

### Final Answer:
One of the synthetic auxins is NAA (naphthalene acetic acid).

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