Name the living organism which cannot seen by naked eye.

Options

A. Microorganisms
B. Chromic organisms
C. Fermentation
D. Lyophobic organisms

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a living organism that cannot be seen with the naked eye. This indicates that we are looking for something very small.

2. **Identifying Options**: The options provided are:
- A) Micro organism
- B) Chromic organism
- C) Fermentation
- D) Lipophobic organism

3. **Analyzing the Options**:
- **Micro organism**: The prefix "micro" means very small, which suggests that these organisms are indeed too small to be seen without a microscope.
- **Chromic organism**: This term does not refer to a known category of living organisms.
- **Fermentation**: This is a process, not a living organism.
- **Lipophobic organism**: This term refers to substances that repel lipids and is not a recognized category of living organisms.

4. **Conclusion**: Since the only option that fits the description of a living organism that cannot be seen with the naked eye is "micro organism," we conclude that the answer is A) Micro organism.

5. **Final Answer**: The living organism which cannot be seen by the naked eye is called a micro organism.

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