Which one of the following dyes is best suited for staining chromosomes?

Options

A. Basic Fuchsin
B. Fast Green
C. Safranin
D. Carmine

Explanation

To determine which dye is best suited for staining chromosomes, we can analyze the options provided:

1. **Basic Fusion**: This dye is primarily used for staining tissue sections. It is not specifically effective for staining chromosomes.

2. **Fast Green**: This dye is known for staining proteins. While it is useful in various biological applications, it does not specifically target chromosomes.

3. **Safranin**: This dye is commonly used to stain gram-negative bacteria. It is not suitable for staining chromosomes.

4. **Carmine**: This dye is specifically known for its ability to stain chromosomes effectively.

Based on this analysis, the best dye for staining chromosomes is **Carmine**.

### Step-by-Step Solution:
1. **Identify the Purpose**: We need to find a dye that is specifically effective for staining chromosomes.

2. **Evaluate Each Dye**:
- **Basic Fusion**: Used for tissue sections, not chromosomes.
- **Fast Green**: Stains proteins, not chromosomes.
- **Safranin**: Stains gram-negative bacteria, not chromosomes.
- **Carmine**: Specifically stains chromosomes.

3. **Select the Best Option**: From the evaluation, Carmine is the only dye that is specifically known for staining chromosomes.

### Final Answer:
The best dye for staining chromosomes is **Carmine**.