The name virus that means venom or poisonous fluid was given by"-

Options

A. Pasteur
B. Ivanowsky
C. Stanley
D. Both 2 and 3

Answer

To answer the question "The name virus that means venom or poisonous fluid was given by," we will analyze the options provided and the historical context of the term "virus."

### Step-by-Step Solution:

1. **Understanding the Term "Virus":**
- The term "virus" is derived from the Latin word meaning "venom" or "poisonous fluid." This is essential to understand the context of the question.

2. **Identifying Key Scientists:**
- The options given are:
- A) Pasteur
- B) Ivanovsky
- C) Stanley
- D) Both two and three (Ivanovsky and Stanley)

3. **Researching Contributions:**
- **Dmitry Ivanovsky (1892):** He was the first to describe a pathogen that caused disease in tobacco plants, which did not pass through bacterial filters, indicating it was smaller than bacteria.
- **Martinus Beijerinck:** He is credited with coining the term "virus" when he isolated the pathogen from tobacco plants and demonstrated that it could infect healthy plants. However, Beijerinck is not listed in the options.
- **Louis Pasteur:** Known for his work in vaccination and pasteurization, he did not coin the term "virus."
- **Wendell Stanley:** He later crystallized the virus but did not name it.

4. **Choosing the Correct Answer:**
- Since Beijerinck is not an option, we look at Ivanovsky, who was the first to identify the new pathogen. Therefore, the correct answer is **B) Ivanovsky**.

5. **Final Answer:**
- The name "virus," meaning venom or poisonous fluid, was given by **Ivanovsky**.