The soil which is used in polishing , filtration of oils and syrups are made of

Options

A. cellulosic plates on surface of dinoflagellates
B. cell wall of chrysophytes
C. cell body of desmids
D. extremely resistant spores of slime moulds

Answer

To solve the question regarding the type of soil used in polishing, filtration of oils, and syrups, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks about a specific type of soil used for polishing and filtration purposes.

2. **Analyzing the Options**:
- The options provided include:
- A) Cellulosic plate on a surface of dinoflagellates
- B) Cell wall of chrysophytes
- C) Cell body of desmids
- D) Extremely resistant spore of slime mold

3. **Evaluating Each Option**:
- **Option A**: Cellulosic plate on a surface of dinoflagellates - This option is incorrect because dinoflagellates do not produce a soil suitable for polishing or filtration.
- **Option B**: Cell wall of chrysophytes - This option is correct. The cell walls of diatoms (which are a type of chrysophyte) are composed of silica and are used in diatomaceous earth, which is effective for polishing and filtration.
- **Option C**: Cell body of desmids - This option is incorrect as desmids do not produce a soil used for these purposes.
- **Option D**: Extremely resistant spore of slime mold - This option is also incorrect as slime molds do not produce a soil suitable for polishing or filtration.

4. **Conclusion**:
- Based on the analysis, the correct answer is **Option B: Cell wall of chrysophytes**.

### Final Answer:
The soil used in polishing, filtration of oils, and syrups is made of the **cell wall of chrysophytes**.