Which one of the following is an INCORRECT pair ?

Options

A. Louis Pasteur- Coined the term 'virus'
B. Beijerinck - contagium vivum fluidum
C. Invanowsky - Studied mosaic diseases of tobacco.
D. Stanley - Crystallised TMV

Answer

To solve the question of identifying the incorrect pair among the given options, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Identify the First Option: Lewis-Pasteur**
- Louis Pasteur is known for developing the first vaccine, which was against rabies, a viral infection.
- However, the term "virus" was not coined by Pasteur; it was actually coined by Dmitri Ivanovsky.
- Therefore, the pairing of Louis Pasteur with the term "virus" is incorrect.

2. **Identify the Second Option: Beijerinck**
- Martinus Beijerinck is credited with coining the term "Contagium Vivum Fluidium," which refers to the infectious agents that are liquid in nature, specifically viruses.
- He is also known for his work on the tobacco mosaic virus.
- This pairing is correct as Beijerinck did associate this term with viruses.

3. **Identify the Third Option: Iwanowski**
- Dmitri Ivanovsky studied the tobacco mosaic disease and identified that the causative agent was a virus.
- He recognized the microbes causing the disease in tobacco plants, which were indeed the tobacco mosaic virus.
- This pairing is correct.

4. **Identify the Fourth Option: Stanley**
- Wendell Stanley was the first to crystallize a virus, specifically the tobacco mosaic virus.
- This pairing is also correct as Stanley's work involved the crystallization of the virus.

### Conclusion:
After analyzing all the options, we find that the first option (Lewis-Pasteur) is the incorrect pair because Pasteur did not coin the term "virus."

### Final Answer:
**The incorrect pair is: Lewis-Pasteur.**

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