Two synthetic auxins are

Options

A. IAA and IBA
B. 2, 4-D and NAA
C. IAA and NAA
D. 2, 4-D and IBA

Answer

**Step-by-Step Solution:**

1. **Understanding Auxins**: Auxins are a class of plant hormones that play a crucial role in regulating plant growth and development. They are involved in processes such as apical dominance, cell elongation, differentiation, and fruit development.

2. **Types of Auxins**: Auxins can be categorized into two types: natural auxins and synthetic auxins.
- Natural auxins include Indole-3-acetic acid (IAA) and Indole-3-butyric acid (IBA).
- Synthetic auxins are man-made and include compounds such as Naphthaleneacetic acid (NAA) and 2,4-Dichlorophenoxyacetic acid (2,4-D).

3. **Identifying Synthetic Auxins**: From the options provided in the question:
- Option 1: IAA and IBA (both are natural auxins)
- Option 2: 2,4-D and NAA (both are synthetic auxins)
- Option 3: IAA and NAA (IAA is natural, NAA is synthetic)
- Option 4: 2,4-D and IBA (2,4-D is synthetic, IBA is natural)

4. **Analyzing Options**:
- Option 1 is incorrect because both IAA and IBA are natural.
- Option 2 is correct because both 2,4-D and NAA are synthetic auxins.
- Option 3 is incorrect because IAA is natural.
- Option 4 is incorrect because IBA is natural.

5. **Conclusion**: The correct answer to the question "Two synthetic auxins are" is Option 2: 2,4-D and NAA.

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