Fungi can be stained by

Options

A. Cotton blue
B. Safranine
C. Glycerine
D. Lactophenol.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the staining method used specifically for fungi. Staining is a technique used in microscopy to enhance the visibility of specimens.

2. **Analyzing the Options**: The options given are:
- Cotton blue
- Saffronine
- Glycerine
- Electrophenol

3. **Identifying the Correct Stain**:
- **Cotton Blue**: This is a stain specifically used for fungi. It stains the chitin in the cell walls of fungi, giving them a blue color, which helps in identifying fungal structures under a microscope.
- **Saffronine**: This stain is primarily used for staining plant tissues and is also used in Gram staining for bacteria. It is not specific for fungi.
- **Glycerine**: This is not a stain but a mounting medium that helps to keep the specimen moist and prevents drying. It does not stain fungi.
- **Electrophenol**: This is not a commonly recognized stain for fungi and is not used for staining purposes in this context.

4. **Conclusion**: Based on the analysis, the correct answer is **Cotton Blue**, as it is specifically used to stain fungal cells.

**Final Answer**: Fungi can be stained by **Cotton Blue**.

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