Which one of following is not an antitranspirant?

Options

A. PMA
B. BAP
C. Silicon oil
D. Low viscosity substances

Answer

To determine which of the following options is not an antitranspirant, we will analyze each option provided:

1. **PMA (Phenyl Mercuric Acetate)**: This compound is known to reduce transpiration by affecting the stomatal opening. It is classified as an antitranspirant.

2. **BAP (Benzo[a]pyrene)**: This compound is primarily known as a polycyclic aromatic hydrocarbon and is recognized for its role as a tumor suppressor. It does not function as an antitranspirant.

3. **Silicon Oil**: This substance is used in various applications, including agriculture, to reduce transpiration by forming a protective layer on plant surfaces. It acts as an antitranspirant.

4. **Low Viscosity Substances**: These are often used in formulations to reduce transpiration by coating the plant surfaces, thereby acting as antitranspirants.

From the analysis above, we can conclude that:

- **PMA**, **Silicon Oil**, and **Low Viscosity Substances** are all antitranspirants as they help in reducing transpiration.
- **BAP** does not function as an antitranspirant; instead, it is known for its role as a tumor suppressor.

Therefore, the answer to the question "Which one of the following is not an antitranspirant?" is **BAP (Benzo[a]pyrene)**.