Mutarotation is not seen in

Options

A. Sucrose
B. D-Glucose
C. L-Glucose
D. Fructose

Answer

To solve the question "Mutarotation is not seen in," we will follow these steps:

### Step-by-Step Solution:

1. **Understanding Mutarotation**:
- Mutarotation is the change in the optical rotation that occurs when an α-anomer and a β-anomer of a sugar interconvert in solution. This process is observed in reducing sugars, where the anomeric carbon can freely convert between the two forms.

2. **Identifying Reducing and Non-Reducing Sugars**:
- Reducing sugars are those that have a free anomeric carbon that can undergo mutarotation. Common examples include glucose and fructose.
- Non-reducing sugars do not have a free anomeric carbon. A prime example of a non-reducing sugar is sucrose.

3. **Analyzing the Sugars**:
- **D-Glucose**: This is a reducing sugar and can show mutarotation.
- **L-Glucose**: This is also a reducing sugar and can show mutarotation.
- **Fructose**: This is a reducing sugar and can show mutarotation.
- **Sucrose**: This is a non-reducing sugar because its anomeric carbon is involved in a glycosidic bond, preventing mutarotation.

4. **Conclusion**:
- Since mutarotation is only observed in reducing sugars, and sucrose is a non-reducing sugar, it does not exhibit mutarotation.

### Final Answer:
Mutarotation is not seen in **sucrose**.

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