Contagium vivum fluidum was proposed by

Options

A. D.J. lvanowsky
B. M.W. Beijerneik
C. Stanley
D. Robert Hook

Answer

To solve the question "Contagium vivum fluidum was proposed by," we will analyze the options provided and identify the correct scientist associated with this term.

### Step-by-Step Solution:

1. **Understanding the Term**: The term "Contagium vivum fluidum" refers to a concept related to viruses. It translates to "contagious living fluid," which indicates a fluid nature of infectious agents.

2. **Analyzing the Options**:
- **Option 1: D.J. Ivanovsky**: He is known for his work in virology and studied the structure of viruses. However, he did not propose the term "Contagium vivum fluidum."
- **Option 2: M.W. Beijerinck**: This scientist is recognized for coining the term "Contagium vivum fluidum." He described the fluid nature of viruses and their ability to pass through filters, which was crucial in understanding viral infections.
- **Option 3: Stanley**: He is known for his work on the Tobacco Mosaic Virus (TMV) and did not propose the term in question.
- **Option 4: Robert Hooke**: He is famous for discovering cells and did not have any association with the term "Contagium vivum fluidum."

3. **Identifying the Correct Answer**: Based on the analysis, the correct answer is **Option 2: M.W. Beijerinck**. He proposed the term "Contagium vivum fluidum" and contributed significantly to the field of virology.

### Final Answer:
**M.W. Beijerinck proposed the term "Contagium vivum fluidum."**

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