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, "The soil which is used in polishing, filtration of oils and syrups are made of," we need to analyze the options provided and identify the correct material used for these purposes.

### Step-by-Step Solution:

1. **Understanding the Question**:
- The question asks about a specific type of soil used for polishing and filtration processes, particularly in oils and syrups.

2. **Analyzing the Options**:
- **Option 1**: Cellulosic plates on the surface of dinoflagellates.
- This option refers to a structure found in dinoflagellates, which are a type of protist. This is not related to the soil used for polishing or filtration.
- **Option 2**: Cell wall of chrysophytes.
- Chrysophytes are a group of algae, but they are not primarily known for their use in polishing or filtration.
- **Option 3**: Cell body of testate amoebae.
- Testate amoebae are protists with protective shells, but they do not contribute to the soil used for these purposes.
- **Option 4**: Extremely resistant spores on slime molds.
- This option refers to spores from slime molds, which are not relevant to polishing or filtration.

3. **Identifying the Correct Answer**:
- The correct answer is related to **diatomaceous earth**, which is formed from the accumulated cell walls of diatoms over billions of years. Diatomaceous earth is widely used in polishing and filtration due to its fine, abrasive properties and high porosity.

4. **Conclusion**:
- The correct answer is **Option 2**, which refers to the cell wall accumulation of diatoms, making it suitable for polishing and filtration of oils and syrups.

### Final Answer:
The soil which is used in polishing, filtration of oils and syrups is made of **diatomaceous earth** (cell wall accumulation of diatoms).

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