Which one is not an antitranspirant

Options

A. Low viscosity resin
B. BAP
C. Silicon Oil
D. PMA

Answer

To determine which one is not an antitranspirant, we need to understand what antitranspirants are and identify the options provided.

### Step-by-Step Solution:

1. **Define Antitranspirants**: Antitranspirants are substances that are applied to plant leaves to reduce the rate of transpiration, which is the loss of water vapor from plant surfaces.

2. **Understand Transpiration**: Transpiration is the process through which water is lost from plants in the form of vapor, primarily through small openings called stomata.

3. **Identify Examples of Antitranspirants**: Common antitranspirants include:
- Phenylmercuryacetate (PMA)
- Abscisic acid (ABA)
- Low-viscosity resin
- Silicon oil

4. **Evaluate the Options**: Among the options given:
- **PMA**: This is an antitranspirant.
- **ABA**: This is also an antitranspirant as it helps in closing stomata.
- **Low-viscosity resin**: This is used as an antitranspirant.
- **Silicon oil**: This is also recognized as an antitranspirant.
- **BAP (Benzo-A-Pyrene)**: This compound is not used as an antitranspirant.

5. **Conclusion**: Based on the definitions and examples, the correct answer to the question "Which one is not an antitranspirant?" is **BAP (Benzo-A-Pyrene)**.

### Final Answer:
**BAP (Benzo-A-Pyrene)** is not an antitranspirant.

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