Term virus was given by-

Options

A. D.J. Ivanowsky
B. Pasteur
C. Beijerinek
D. Stanley

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Virus":** The term "virus" originates from the Latin word meaning "poison" or "venom." This indicates that viruses were initially thought to be harmful agents.

2. **Identifying the Scientist:** The term "virus" was first introduced by the scientist **D.J. Ivanovsky**. He was studying the tobacco mosaic virus and referred to it as a "poisonous fluid."

3. **Differentiating Other Scientists:**
- **Louis Pasteur** is known for his work on pasteurization and bacteria, but he did not coin the term "virus."
- **Beijerinck** confirmed the infectious nature of viruses but did not name them.
- **W.M. Stanier** contributed to the study of viruses but was involved in their crystallization rather than naming them.

4. **Conclusion:** Based on the contributions of these scientists, the correct answer to the question is that the term "virus" was given by **D.J. Ivanovsky**.

**Final Answer:** The term "virus" was given by D.J. Ivanovsky.

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