Mutarotation does not occur in:

Options

A. D-Glucose
B. Sucrose
C. L-Glucose
D. Both (a) and (b)

Explanation

To determine which compound does not exhibit mutarotation, we first need to understand what mutarotation is.

### Step-by-Step Solution:

1. **Definition of Mutarotation**:
- Mutarotation is the change in the optical rotation of a solution as it reaches equilibrium between two anomeric forms of a sugar. This typically occurs in sugars that can exist in both alpha (α) and beta (β) forms.

2. **Understanding Anomers**:
- Anomers are a type of stereoisomer that differ in configuration at the anomeric carbon (the carbon that was the carbonyl carbon in the open-chain form). For example, glucose has two anomers: α-D-glucose and β-D-glucose.

3. **Identifying the Sugars**:
- The question provides three options: D-glucose, L-glucose, and sucrose.
- D-glucose and L-glucose are both monosaccharides that can exist in α and β forms, thus they can undergo mutarotation.
- Sucrose, on the other hand, is a disaccharide composed of glucose and fructose. It does not have an anomeric carbon that can freely interconvert between forms.

4. **Conclusion**:
- Since D-glucose and L-glucose can undergo mutarotation due to their anomeric forms, while sucrose cannot, the answer to the question is that mutarotation does not occur in sucrose.

### Final Answer:
Mutarotation does not occur in **sucrose**.

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