Bacterial flagella are stained by

Options

A. Crystal violet
B. Basic dye
C. Carbol fuschin
D. Lefson stain

Answer

To answer the question "Bacterial flagella are stained by?", we will analyze the provided options step by step.

### Step 1: Analyze the Options
We have four options to consider:
1. Crystal violet
2. Basic dye
3. Carbon fission
4. Lafzon stain

### Step 2: Evaluate Each Option
- **Option 1: Crystal Violet**
- Crystal violet is primarily used as a histological stain and is not specifically used for staining bacterial flagella. Therefore, this option is incorrect.

- **Option 2: Basic Dye**
- Basic dyes are commonly used to stain bacteria, including their flagella. They have a positive charge that allows them to bind to the negatively charged components of bacterial cells. This option is correct.

- **Option 3: Carbon Fission**
- Carbon fission is not used for staining flagella; it is typically used for staining mycobacteria. Thus, this option is incorrect.

- **Option 4: Lafzon Stain**
- Lafzon stain is not a recognized method for staining bacterial flagella. Therefore, this option is also incorrect.

### Step 3: Conclusion
After evaluating all the options, the correct answer is **Basic dye** (Option 2).

### Final Answer
Bacterial flagella are stained by **Basic dye**.

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